RE: NEED HELP WITH MY 4-TEC
You won't need to plug anything into the "BAT" port on the receiver. The ESC will power the receiver directly through the connection at CH2.
First things first, did you read the manual for the speed control? It's been a long time since I've used a Traxxas controller (and I've never used the VXL) so I can't give you specifics, but there should be a setup process to calibrate the ESC to the radio.
If that doesn't work you will have to start troubleshooting. For example, are your battery connections good, is the battery itself good, does the steering work when the battery is plugged in, or does nothing work at all?