I'd just find a cheap AM radio. Dont really matter what kinda. Just something to get you started. I've seen some [Radio and reciever] for around $10 on RCzone, and places like that. Try ebay?
http://www.rcmart.com/catalog/produc...ducts_id=16819 I'd use this ESC. It's cheap, And handle's decent turn's.
For battery's, hit up Radio shack.. 3300mah pack's are $25.