Second hand car, say a BD7 13 $150-200
Blinky esc like speed passion Reventon S or R, or hobby wing stock pro. New $80 tops
Or second hand esc $40-60
New trackstar motors are $40ish each, second hand good motors from 40-60
Batteries from $35-50 new
Buying second hand is usuall the best way to save, just check what your buying. If you're not sure, ask someone at your local track.
Practice as much as you can, as if you can drive the car without crashing, you'll be faster than someone who crashes a lot.