I would stick with the radio you have,
Batteries?
NiCad are still in use as are NiMH, same size but higher capacity (more flights)
I use 2,000mah 4.8v NiMH packs at around $20 a pack.
I use these:
http://www3.towerhobbies.com/cgi-bin...?&I=LXNRH6&P=7
You can get them at The Prop Shop (Van Dyke just north of 9 Mile if you haven't been there before, it is the mecca of RC airplane stuff in this area)
I would suspect your airframes should still be good but certainly give them a good look and replace all your old fuel lines.