The parts you have bought are standard rc car components. I assume that people who build my cars know the basics already. The GT-2E comes with a receiver which communicates with the 60A ESC and servos via the three lead cables. The instructions should describe how.
You can ask about it in this thread, and post pictures if you like, and many will help you: https://www.rcgroups.com/forums/showthread.php?2883085-3D-Printed-monster-truck