A suggestion from an old timer.
Take a look at the www. Horizonhobbies.com website. I suggest Horizon because of their higher than average kit and radio quality. You will find Almost Ready To Fly (ARF) aircraft there of high quality. If you look into the Alpha Trainer, the engine that comes with the plane has already been mostly broken in for you. This is a common problem area for beginners.
The Alpha Trainer, and the Extra Easy if it is still available, come as a package with the radio and engine. Both of which are for the most part already installed. Final assembly of the aircraft takes about 1/2 hour to 1 hour with few tools required.
Twin engine aircraft are indeed flown in R/C, but I suggest you wait until you gain a bit more experience than you have now. Twins are not necessarily faster than single engine aircraft, but they do present unique problems quite often if one engine quits while in flight. A person with little or no experience will most likely crash the plane trying to land it engine out.
The "special fuel" you were asking about is available at just about any hobby store. It's cheaper by the gallon and if you are flying a lot it would be a smarter purchase than pints or quarts. Fuel comes in different grades, usually qualified by the percentage of nitro used in the mix. Most sport flyers and trainers use a "10% mix". Your hobby dealer will steer you in the right direction.
Get into the Academy of Model Aeronautics (AMA) website at
www.modelaircraft.org and see if there are any R/C clube in your area. If there are, that would be an excellent place to see how it's done. It would also be the right place for you to find an instructor, or someone to teach you how to fly. There is usually no charge for this service if you choose to join the club. DO NOT try to teach yourself. You will only destroy an airplane on the first ATTEMPT to fly it. That would be a foolish waste of time and money, all of it yours.
While you are visiting the AMA website, look into the basic safety rules for radio controlled airplane flight. They work pretty well for keeping you and everybody else relatively safe. R/C airplanes are really not toys. they are smaller sized versions of people carrying aircraft and can, and have, caused serious injury when not flown properly and safely. Have as much fun as you can, but use common sense and a little caution. All clubs have general rules that they want you to follow at the field, generally they are the same as the ones proposed by the AMA.
In closing, welcome to the world of radio control aircraft. Whatever area finally captures your interest, you can have a life time of fun if you stick with it. Learning to fly R/C aircraft does not happen over night. It takes time and practice. Don't become discouraged if you don't get out and "solo" immediately. Everyone learns at a different pace, so when you do finally solo, it will have been the right time. A good instructor will not let you solo before you are ready. It saves you a lot of money by not crashing your plane.
Enjoy and have fun!
Silversurfer