This is what I did.
1. Looked on R/C universe (Very helpful)
2. Asked my instructor. (Even more helpful)
3. Tower Hobbies website. (Very educational)
4. eBay, had fun and got some very good deals on useful stuff.

Best advice I got was to fly your plane one or twice with your instructor's flight box and then see what you really need to start with. Bring only what you need to fly your plane to the flight line, fix it at home or back at your truck.

Good Luck!