Have you ever flown a model that needed opposite rudder to turn? I'm reasonably sure that any beginner's model that needs that combination is so badly set up (as Speed points out) that a beginner shouldn't be learning to fly with it. The OP is a beginner and seems pretty clearly to have no idea of what normal flying requires. An answer that basically says "all planes are different so we can't answer your question" isn't likely to help him. Every four-channel trainer I know of will turn reasonably well with ailerons (and some elevator). Many of them will turn even better with some rudder in the same direction as the bank, especially if they don't have aileron differential or if they have too much dihedral.

You are absolutely right in saying that he needs the help of someone more skilled; we can't teach him to fly here. But we can disabuse him of the idea he seems to have picked up somewhere that cross-controlled turns are the norm.