I use a simple home-made tool for checking toe-in. Used with care, it will provide results as good or better than the expensive machines at the shop.
To use it, you first jack the car up and spin each front wheel while holding something against the tire tread that will leave a mark (eg a nail in a piece of wood). This ensures the mark is perpendicular to the wheel axis (and more accurate than using an edge of the wheel for example).
Then lower the car to the ground (in a flat area) and ensure the steering is straight ahead (which may or may not correspond to the steering wheel being in the center). Bounce it a few times (or roll back and forth) to help the suspension settle to normal height.
Now slide the tool under the car and lay it against the back of the front wheels, so the two upright pieces are against the tire tread as close as possible to spindle height. Transfer the marks from the tire onto the edge of the boards with a pencil.
Move the board to the front of the tires, and match up one of the marks. At the other upright, the distance between the mark on the board and the mark on the tire is the toe-in (or out, if the tire mark is farther out than the board mark).