1. You can't really get a good "starter kit" kind of thing, they are all pretty much major rip-offs that give you the wrong supplies anyways. Check Craiglist to see if someone is selling a beardie set-up, their extra tanks, or reptile supplies. You can get all sorts of stuff there for really cheap. And for UVB lights and other things, www.petmountain.com has great prices.
2. One beardie per tank, period. They are not social, and in most cases they end up fighting or killing each other.
Wow Jess thanks for all your help I will go down the line and get everything on it to be safe!! I think I need to read bait more to get everything straight on handling!!