Tamiya makes a XB Series that consist of instructions, car, radio, tires, body and you just need to add your own batteries and a charger. Best thing to do is to visit your local hobby shop and talk to them and let them know you are just starting out and maybe want to get something that you can add to later on. Hope this helps and welcome to the hobby.
Also make sure you look up anything you might need answers for on the forums if your not sure. The main thing to remember is that this is a hobby and it's for fun and always ask questions, even at your local track.