I'll take a stab at it. From your description, I think this
tie rod tool is what you need. You would place it between the tractor "frame" and the ball using a hammer to drive the fork between the two.
Field fabricating a tool for toe, you can use a length (tractor width) of pipe attach a 90 deg. ell to one end with a 2 footish length (tire size) on the other side of the ell. the other end, use a tee fitting ( might have to overdrill) so it can slide on the pipe, on the other side of the tee attach a short length of pipe and add a "pointer". Slip across the tires at the mid to 3/4 point on the front side "measure" the distance and then "measure" the back side.
For a tractor, I'm assuming the closer to a difference of zero, the better.
Toe
Picture yourself hanging from an engine hoist directly over the front axle of your vehicle. Now imagine you've got X-ray vision and, for now at least, you're going to look through your car's hood and fenders to see the front wheels (there will be time to look through people's clothes later). At this point, you would be seeing the measurement of toe in your front-end. Toe is the angle of two wheels on the same axle, in relation to each other. For instance, if your front tires both pointed directly straight ahead and were parallel to each other, you would have zero toe. If the front of the tires were closer together than the rear, this would be toe-in, and if the rear were closer than the front, toe-out. Toe plays a major role in how a car feels going through a corner with toe-in creating more understeer and toe-out increasing oversteer. This is also where gas mileage can be improved since a vehicle with too much toe will be creating excessive friction and using up fuel (and tires) faster than it should. Toe settings vary from car to car and are determined by many factors including drivetrain layout and vehicle design.