RR2, you home now? Good kit choice. Unfortunately, you won't be able to load any 20mm cannon ammo, but anything smaller than that is fine
Yup, pistol ammo will be fine, too. It'll look kinda lost in that huge press, but it will work.
What scale was it that's supposed to be "junk"? The RCBS 505 that I think comes in that kit is just fine for a balance beam. You won't need a trimmer or a case tumbler immediately, but you'll need the trimmer before you need the tumbler. If you only load one or two cartridges to start with, you can get some cheap Lee hand trimmers. They actually work very well, just slow and finger-tiring.
You'll need dies and a shellholder for each cartridge you load. All brands are fine, including Lee, but the other kinds are maybe a bit better.
Components are the last thing to buy. Primers, powder and bullets. Don't buy those until you've read all those books at least once - preferably twice.