I would suggest the Tekin RS speed control for your brushless motor. It is small and programable. It also has more punch than some other brands that I have run.
I have only run Novak brushless motors but I am sure there are others that are good. You might actually start out with a 17.5 motor as it will be easier to drive than a 13.5. Once you can run a 5 minute heat without hitting any boards then think about a faster motor.
I would higly recommend LiPo batteries for you car. I actually race with just ONE Thunder Power 5000 and I just recharge it after every round. Get a good charger, Thunder Power makes one, but there are others. If you are going to get a good car like an x-ray, get good stuff to go in the car.
Tires are very important. Jaco greens are popular for indoor carpet racing and outdoor asphalt up to about 70 degrees. As it gets hotter you go to harder tires (jaco blue, then jaco orange). Tires are important, find out what the local guys are running.
Get the xxx main chassis set-up book and study it. http://www.xxxmain.com/bookz.shtml
Remember to have fun, don't worry about going pro. That will happen if it is ment to be.