One of our club trainers is that exact airplane it flies very nicely with an O.S. 40 LA (no longer available) but the O.S. 46LA I believe still is. These are entry level engines and you will be told to use any number of engines from what I just mentioned to a Saito 4-stroke. This is your first airplane - It will be taking some lumps and bumps so you don't need a high end engine. You will likely find a bunch of these engines new and used on E-bay or in the Buy&Sell area of this site. A radio is another matter. Definitely a 2.4 GHz "programmable" is highly recommended. You will likely end up with more than one airplane making the radio key to your happiness. Futaba, JR, Spektrum, and all the others offer what you need. 6 or 7 channels will suit your needs for a long while. If you get into warbirds where you have flaps, retracts, bomb drops, and bomb bay doors you obviously need lots of channels so 8 or more is in order. More channels = significantly more money. Research your needs thoroughly. But just getting started you can get buy with a simple 4-channel Tactic.