Hi All .. I just bought a B44 roller and as a Newbie I'm after some advice .. Well plenty of advice really

So as a roller I understand that I will need:

Receiver & Transmitter
Motor
ESC
Pinion Wheel
Servo
Batteries
Tools, wouldn't hurt either

I have split my posts into three sections: Electronics, Batteries & Tools - That way I guess we can all add only to what is of interest to each of us:

For now I don't want to spend a bomb - No immediate plans to race - Simply race my sons B4.1 on the track I'd like your opinions on what gear to buy based upon a new starter, reliability, control and speed.

Here are my thoughts:
-Receiver & Transmitter - Was considering the Fly Sky GT3B 2.4G - Seems suitable for what I need .. The GT3C looks better but I can't see the value for me with the LCD readout and PC connectivity.
-Servo = No idea
- Motor & ESC = I see plenty available as a kit, is this worthwhile - What should I be looking for or what would you reccommend for both. Obviously brush less.
- Pinion Wheel = I understand that this is all about gearing but I guess it must be based upon the motor I decide on, how many teeth or what # should I look for, should I buy a few .. this will probably be noticeable as I swap them out I guess.

Thanks in advance for any replies.. I'm seriously looking forward to getting into this hobby .. My parents would never buy me a buggy as a kid .. Now I've bought one for my son and the his dad!!