OK My preferred activity is pylon and multi engine with a little old timer thrown in for effect And I am not a 3D flyer. But the basics of what you are going to need will be at least dual aileron servos on separate channels and two elevator servos on separate channels for each half of the elevator. Each elevator half must be separated if they already are.

Next you will need a very capable Tx with multiple free mixs (You won,t find Tailerons on any pre programed mixs). What you need to do is to post in the 3D forum and you might get some help there also if you refer to the function as tailerons instead of elevons it will save some confussion. This is way beyond the perview of a beginners forum.