To use the transit you start by placing the tripod on a fairly level space. If necessary you may have to raise or lower a leg or two to compensate for uneven ground. With the transit solid on the tripod and fairly level use the three eybolts to adjust the transit so your measurements are taken properly. Direction is determined by the compass.
A measuring pole can be made from a long pipe or board. I made a 11’ pole by ripping a scrap 2x4 and splicing it together. For the measurement I tacked an old tape measure on it. Then I made a slide so my helper could mark the measurement with the slide if I cannot see the numbers on the rule clearly. The pole turned out a bit heavy so I’ll probably make a shorter one with something lighter.
Using a transit requires a rudimentary understanding of grades, compass direction and measurement. With a bit of patience and work you can plot out the grade of a piece of land accurate enough to determine drainage or how much effort it will take to level the property. Sure saves a lot of money on surveyors and equipment!