well sounds like the old rusty carb trick to me most well all my glow engines are OS so my TT knowledge is limited, I would think get some WD-40 un hook your servo wire and carefully rotate the lever would be my first guess if its frozen with rust you might have to replace it (the carb).
does the engine turn over using the prop? do you hear obvious grinding sounds then yes probably get the visa card out and there you go. I have not ever had this happen to my self lucky I guess.my os carbs have a lever on one side and a nut like thing on the other not sure about the TT but if you have to really work hard a freeing up the barrel in the carb, turn it using a wrench not the lever, especially if it happens to be plastic.
you live by the ocean? I do and when I store my planes for long periods, I just oil them up and bag em with a rubber band to seal the plastic over the motor. going to check tower and see if they have a exploded view.