Perfect choice! Welcome to the best hobby going.
You can order a flight pac for a heli, which will include 5 servos and usually a battery with a higher capacity or for an airplane, which comes with 4 servos and a standard battery.
Whichever you choose, tell whomever you order from what chanell you need and thats what youll get. It does cost more, but, you gotta have it, right?
I only use JR equiptment, so, Im assuming other brands do things on pretty much the same order?
Good luck and have fun!