RE: TC4 accessories ?
If you are planning on racing; You will need to know what classification you want to race in & they will have a motor limit/range. Then that will help you narrow it down at least to what range of motor speed you are looking at. If you are just looking to do some track running then its up to you. Remember, on a track "top speed" is not all what is important.
Some possible good motor recommendations below:
Few motors in some different price ranges for you to take a look at:
Good bang for your buck
Reedy 3300kv
Traxxas Velineon
Duratrax Onyx
Dynamite Fuze
(Can look at thier ESC's for a set as well or mix & match so to speak with other ESC's you may like)
Recommended Tires (if allowable in your class)
I highly recommend having the 31mm tires in the rear if allowable in your class. I like having a little more meat in the rear... I am considering going 31mm for front as well (using standard 26mm for front right now)
RX/TX:
A good all around 2.4ghz RX/TX combo could be the Spektrum DX3c and SR rx's another good bang for your buck.
You can look at some of the stuff from Turnigy etc.... heard good things & it will save you $, but I do not have any personal experience with there motor/esc's. Hope this helps some. Just some recommendations.