The first question is: What type of flight experince do you have? you mention buying electric stuff, but knowing your skills can really help..

2nd: Scale planes should always be saved for your 3rd, or 4th plane. They are almost always at the upper end of the 'flying skill' ladder. So, if you've been with cubs and trainer types, you might want to rethink making this your first 'low wing' plane.

3rd, Going gas (fuel, methanol, glo-fuel, what ever - the wet stuff) wil require a few additinal purchaces: feild equipement! A starter, battery, glow igniter, fuel, means of fueling the planes, etc..

4th, the radio. It's really up to you, your choice. I would recomend the Futaba 6XAS, as it has a slew of features. JR have a similar radio, with an equal amount of features. Pretty much all the radois now-a-days feature a 'buddy box' port. But JR for JR, Futaba for Futaba, etc...

As for the buddy box, best to buy the skysport 4 channel radio. It's about 20 more than a typical Futaba flight pack (for your next plane) and you get an extra transmitter, that you can use as teh buddy box. Otherwise, you'll have to borrow from someone else..