Hey guys, we just bought a house with a pool last fall and closed it about a week after moving in since it was getting cold already and a million leaves come down around our pool. We just had the pool guys close it. Spring has rolled around and now it's time to open. I'd like to do this myself (and potentially close maybe in the future). I have never owned a pool in my life and know absolutely zero about pools, so please be patient with me because some of my questions will probably be stupid 
I read through most of the pool school section and think I have a pretty good handle on all the basic chemistry now. I ordered an fas-dpd test kit to arrive in a few days in the mail. I've picked up liquid chlorine and a few other supplies, hoping to do the BBB method. The pool equipment looked like a spaghetti maze of pipes to me, but after doing some reading I think I have an understanding of how it all functions as a unit now. I also still need to measure the pool to get the appx volume.
I've read some articles about opening and have a basic checklist from the mailers that the local pool companies sent out, but had some silly questions still:
1. My winter cover is a held on by what look to be plastic clips which I saw the guy hammering into the track... they don't seem to pull out by hand easily, so do I just need a screwdriver or something or is there an easy way to do this? I'm sure I can get them out, but basically just don't want to break them as I notice a few are cracked already.

2. I've got a picture of the components they took out in the fall. There is also a cover plate there, and also a separate vacuum cover plate (is that just to put in the skimmer for better suction when vacuuming?) I don't know if they just threw everything in the same bin with old/new equipment. The filter gauge is not at zero either, so should I assume this is broken?

3. The plugs both look to be in the bottom of the pump, so I don't know if it was actually "drained'... but there's some green liquid in it (antifreeze?) - is that common to run the system dry and then just throw some antifreeze in rather than pull the plugs on the pump?
4. Is there anything I should check on the heater or sand filter before starting up?? Any maintenance to do? I thought I read something about checking for cobwebs etc... Our equipment is in a basic poolhouse btw, so it's not exposed to the weather as much.
5. We have a black box that looks like it might be for pool lights??? But I didn't think the pool had lights and I don't think this box was ever plugged in since we moved. Does anyone know what itis (on far right)?

I peeked under the cover and the water looks pretty clear... so once I get the system running which is my biggest concern... I assume I would do some manual cleaning, then test the water and figure out what the proper amount of chlorine would be to get it to shock level and monitor from there? Also, to prime the pump I assume I get the water up to skimmer level, add water to pump basket and then just start it up with filter on recirculate???
Below is the whole setup we're working with if that helps... I think that's it for my long list of questions... I'm probably being overcautious, but since I've never owned a pool, I want to avoid breaking anything expensive
I've tried to do as much research as I could beforehand, but it's a little overwhelming at first.

Glad to have found such a helpful forum and I'm looking forward to a smooth opening! I'll post a pic of the pool once it's open.
I read through most of the pool school section and think I have a pretty good handle on all the basic chemistry now. I ordered an fas-dpd test kit to arrive in a few days in the mail. I've picked up liquid chlorine and a few other supplies, hoping to do the BBB method. The pool equipment looked like a spaghetti maze of pipes to me, but after doing some reading I think I have an understanding of how it all functions as a unit now. I also still need to measure the pool to get the appx volume.
I've read some articles about opening and have a basic checklist from the mailers that the local pool companies sent out, but had some silly questions still:
1. My winter cover is a held on by what look to be plastic clips which I saw the guy hammering into the track... they don't seem to pull out by hand easily, so do I just need a screwdriver or something or is there an easy way to do this? I'm sure I can get them out, but basically just don't want to break them as I notice a few are cracked already.

2. I've got a picture of the components they took out in the fall. There is also a cover plate there, and also a separate vacuum cover plate (is that just to put in the skimmer for better suction when vacuuming?) I don't know if they just threw everything in the same bin with old/new equipment. The filter gauge is not at zero either, so should I assume this is broken?

3. The plugs both look to be in the bottom of the pump, so I don't know if it was actually "drained'... but there's some green liquid in it (antifreeze?) - is that common to run the system dry and then just throw some antifreeze in rather than pull the plugs on the pump?
4. Is there anything I should check on the heater or sand filter before starting up?? Any maintenance to do? I thought I read something about checking for cobwebs etc... Our equipment is in a basic poolhouse btw, so it's not exposed to the weather as much.
5. We have a black box that looks like it might be for pool lights??? But I didn't think the pool had lights and I don't think this box was ever plugged in since we moved. Does anyone know what itis (on far right)?

I peeked under the cover and the water looks pretty clear... so once I get the system running which is my biggest concern... I assume I would do some manual cleaning, then test the water and figure out what the proper amount of chlorine would be to get it to shock level and monitor from there? Also, to prime the pump I assume I get the water up to skimmer level, add water to pump basket and then just start it up with filter on recirculate???
Below is the whole setup we're working with if that helps... I think that's it for my long list of questions... I'm probably being overcautious, but since I've never owned a pool, I want to avoid breaking anything expensive

Glad to have found such a helpful forum and I'm looking forward to a smooth opening! I'll post a pic of the pool once it's open.