Raymond, Tell your "not so stupid friend", what Larry says is correct. Toe-in is the difference between the front and rear width measurement at the center line of the tire, as measured at the center of the hub heigth, sitting on the ground.
However while you have the opportunity to jack up the tractor(Chock and Block the rear tires, safety first.... :') , spin the tires to see if you have a bent rim, separated tire or rough bearings. Then grab a tire and work it back and forth up and down, check for loose bearings, bushings, pivot points, ball joints and radius arm ends. Check to see if it steers well jacked up, put a pry bar in the center pivot point and see if it has any slop.
Have fun, but be safe. HTH