How do you square the whole system up with the toe plates?
Short answer; a lot of measuring.
long answer and to answer the other questions;
I have the QuickTrick alignment stuff, toe plates and 3 or 4 different digital angle gauges.
just setting toe, start in the rear. Setup the toe plates and get them to 0. Then, measure from reference points on your tire to the frame. You can also use a 2x4 going forward and make reference points at the frame or even the center tower. If toe is 0 and your reference points are equal, you are at “center”. Then adjust your toe in equally to the desired Specs.
the front gets tricky because there’s a steering wheel. Do the same with reference points and “eyeball” to get to 0, then make sure your wheel is straight. And add desired toe in.
you can make a piece of plywood your toe plate for quick stuff. 2 measuring tapes (identical) and a digital angle gauge can do it all.
Zero angle gauge on the frame, then place it on the toe plate or a flat part of the wheel.
Zero the gauge on the center tunnel going front to back, then move to the back side of the front hub bolts.
every time you take a different measurement, you’ll have to zero the gage as your reference point. This is the most basic of ways, but it is more accurate than you think.
I can explain a little better later, I’m a little short on time at the moment.