IS THERE A EASY WAY OF SETTING THE TRUCK UP TO GO STRAIGHT. I HAVE THE FRONT WHEELS LINED UP AND IT STILL WANTS TO TURN ON IT OWN.

it all depends on the slop in your steering linkags and your transmitter turning. Generally if you want to go fast and straight toe the wheels out just a little bit (3 degrees max) conversly if you want to do cornering toe in up to 3 degrees. then while running straight adjust your steering center point on your radio

You might also spin each wheel one at a time. One wheel may be too tight or have bearing issues. I would also check the rear for binding on one side or diff issues. Look for broken parts as well. I had this problem once, but I do not remember what the silly issue was. It was something binding or broke, not steering adjustment.