2.4ghz radios, you can buy a cheap set anywhere or just pick up a second hand set on here, driveshafts ive never tried those metal ones but you can get upgraded plastic ones that withstand brushless no problem but i cant remember which ones off the top of my head, 2s lipo would probably be quick enough but 3s would probably still be usable, when you say alloy hexs that bolt into the wheels do you mean alloy hexs to use hex wheels instead of the stock ones that just use the pin? if so, yes you can and I dunno if they were available when you last used it but theres alot of rpm and anza parts out now which will make it indestructable if you ever break any of your stock parts its worth upgrading because the parts arent mega expensive
Id also advise buying one of these if your running lipos and brushless http://www.modelsport.co.uk/traxxas-planetary-gear-differential-with-steel-ring-gear/rc-car-products/31675 The stock plastic one doesnt last long