Most of the kits in the category that you are looking include most of the hardware like horns, pushrods, etc. Depending on the exact kit, you may want to buy tires of a different size, you will generally need covering material in whatever color/s you choose, and of course, the radio equipment, and motor / engine that you want. The kit includes the basic wood and hardware to complete an airframe, but you choose how you want to finish it. You select Monocote, or Ultracote typically, you would have to have an iron and a box of exacto and razor blades to cut that with, the iron to put it on and shrink it with. Most kits in your category will just use standard servos and battery, receiver, such as what you get when you buy a transmitter, most come with a receiver and several standard servos. You may need one or two more servos, you will have to check in the kits' list of components needed to finish. It doesn't need to get complicated with any of the standard kits. They generally work well just as long as they are built according to direction. You don't need to be an engineer to do this, it can actually be fun! Did you have a specific kit in mind, or do you want recommendations based on build? The 4star and Tiger models are good solid build / fliers, you really can't go wrong with them. If Bruce Tharpe cuts any more of his Venture 60's, that would be the ticket. I can't say enough good things about that kit. If you ever build one, you will be spoiled for life.