Welcome to the forum :lol:
If it's not too late, it really is a good idea to review the builder's pump/filter selection. Too often, they simply sell horsepower and they themselves don't really understand the value of a decent, small (about .75hp like dman suggested) pump paired with a filter that will exceed the pumps capacity. This is a bit of oversimplification but a .75 hp pump will produce somewhere around 60-75 gpm (I think). Then, you would choose a filter that that has a rated capacity of around 90+ gpm. It's a very confusing part of equipment selection so don't hesitate to post back until we help you get it clear.
I would strongly suggest you hold off on the liquidator at a later date. you will not save any money by putting it in now and you may find you didn't want it, after all.
Prior to the fill, you should have on hand a GOOD test kit (the one the builder gives you simply will not be adequate even though he/she might believe it is). BBB is all about very careful and accurate testing. Naturally, I am prejudice towards the TF-100 but the K-2006 kit by Taylor is good, too.
The other item you should have on hand is a few large jugs of Clorox.
That's all you need.
As dman suggested, read the "ABC's of Pool Water Chemistry" found in Pool School. It'll be hard to absorb everything the first time but stick with it and ask us a lot of questions and you will be off to a great start