Sometimes you can get everything used from one seller or you may have to get it piece by piece but you still save some money. You may even find a complete set-up with another plane, etc..for what you would pay new for just the accessories. Depending on the club where you joined, ask there as well and you may pick-up what you need or someone may give you some things they have as surplus.
The Evolution engine on that plane will run fine on 10% nitro. Any higher percentage only costs more and won't do much for performance....sort of like putting super octane in a vehicle designed for regular.
Look for some spare propellers too as those stock 3-blades like to break on not-so-graceful landings!