Can anyone help me out concerning RC nitro buggy cars?

There are numerous websites concerning the basics of RC nitro racing.
One that I found quite helpful was:
http://www.rccartips.com/

I also suggest going to your local hobby shop and asking the rc specialist about it, and don't forget to pick up a magazine such as "Radio Control Nitro" and "R/C Car".

Good Luck and Happy Racing!
References :
I used to be into the hobby of rc racing.

Go to hobbytownusa and they have people that work there that can help you, or find a local club and ask them, I recommend Traxxas products.
References :