I bought a Traxxas 5608 E-Revo Brushless with Traxxas TQ 2.4GHz DSS, 4-channel receiver with built-in fail safe.

My question is, I just bought a used E-MAXX, how do I get it so I can use the 2.4GHZ that came with E-REVO for the E-MAXX without having to buy a whole new Radio and Receiver set?

Do i just buy a Traxxas 2.4 GHz Receiver and if so what one?

Is it hard to install the Receiver and setup with the controller?