That's an old Associated RC10 Gold Tub. A classic...

Parts are still readily available, though, brand new through http://www.towerhobbies.com or direct from http://www.teamassociated.com as well as a zillion other shops.

It really doesn't appear to be in bad condition by looking at your pics. The aluminum chassis gets scratched up in a day, so that one really doesn't look bad. The rest of it could probably just use a good disassembly, cleaning, and reassembly/lube.