OK, so you said you need help with the shopping list, let’s go through what you have,
You’ll get all of that probably at the same place, a lumber yard, or a big box thing like Home Depot, or Lowes, or Menards (If you have one in your area), I would add maybe add 3 or 4 tubes of white latex caulk, to use as a adhesive for the track bed to foam and the track to track bed. Track nails won’t work with a foam base.
There are a couple of options, cork is probably the most popular, and the easiest to find.
Go with Atlas track, joiners and switches (turnouts), go with code 100, nickel silver.
I don’t know what you have for hobby stores in your location, but you’ll probably find it all in one place.
I suggested Atlas because it will be the easiest to find.
I think you could use 22 ga. It should be fine for your needs, and easy to work with, get the stranded wire, not solid. Get red and black wire, so you can keep the wiring seperated the way it needs to be.
Atlas also makes track joiners that have a feeder wire already attached, those would be handy for you to use instead of any soldering.
For a power pack, I would go with MRC. The 2500 would be biggest I would get, but you could probably use the 1400.
No special tools needed, maybe a wire stripper, easier than a knive, some electrical tape, maybe even some small wire nuts to make your connections, and speaking of connections, there are many options, I’m just suggesting the simplist ways.
If I think of anything else, I’ll post again.
Good luck, and above all, have fun!
Mike.