1. That should have been listed by designer and then included in the excavators quote. Did you submit subcontractor notes to each of your subs to quote off along with the plans? It would have been included in these as would say grading etc..
2. Excavator will do this. I HIGHLY recommend having them come lay it aout a couple days in advance giving you time to see if you like the placement, wnat to make any areas larger, move further from the house etc. I did all the above and made most of the changes I listed above. I also recommend having them outline the dig AND then a line inside the dig line where your pool will actually begin or actual swimmable area. Remember, they're going to put about 9" of shotcrete around the sides.
I had to temporarily remove my A/C condensing unit so they could get the Bobcat down the side of my house, but the excavator removed the fence - - - - but did not re-install it. That was on me.
I drew my pool outline with flour weeks before my excavation.
You should call your excavator to make sure it is/is not included in your bid if you are not sure.
Yes definitely have 2 lines drawn, one for waterline and one for excavation. Our PB did it and it was great to be able to see it and easy to double check for correct measurements. Also, if you have to have city inspections for the layout, it makes it go much smoother.
We did our own build and hired someone to draw the outlines before excavation came in. The excavators took down our cinder block wall, but we had discussed that with them well ahead of time. I hope that helps.