Hello.
I tried to build an RF Transmitter and reciever once....
This is not an easy project. The Schematics seem simple enoughf, However tuned circuts are difficult to build. Not to mention you will need more than one channel to control differnt things.
I ended up buying a cheep RC car that included the Transmitter, reciever, motor, and even a few servo motors and canableized it for the parts.
It made the project much more enjoyable and achieveable.
I hope this will save you some headache.
Have Fun.
Chris