RE: TX Question
IMO, it's not worth it. You'll have to buy a flight kit (RX and servos, RX battery etc) which will be about $120. So you'll have $250 in the system when you can buy a new medium range comuter system for near that. Depending how old it is, some field frown on using the old wide band stuff anyways (so I'm told). I am dealing with that exact situation now.
Good luck,