I used to have a tower trainer. It is very docile and perfect for a beginner. I used standard futaba 3003 servos in it. As far as props go, a 10*6 is a good starting place for the engine. You might also try a 10*7, 11*6 and 11*5. Master Airscrew plastic props are good to learn with as they tend to not break as easily on not so perfect landings. Once you get landing down pat try out the APC brand props. They are stiffer props and wont flex in the air, giving you better performance.

Chris