For throtle I would go with this.
A pair of those should be perfect for starting out. Once you learn to drive well I would go and purchase a faster servo for steering. If you are budget minded then stick away from digital servos in nitro aplications. They will wear out much faster then non digital servos will. The nova rossi n21 bf is also a good choice. It is virtualy identical to the rb concepts motor. The cheaper motors will go toe to toe with the high end motors on a small track. However, they do not rev as high so on big 200 ft. straight aways you can notice a differance.
For a starter box I have personaly been using this for the past two seasons and it has worked great.
You will also need to purchase a heat gun. These motors should be warmed up before you crank them up. It will greatly aid in keeping them running for many gallons. You can purchase one at a home depot for like $25.