Question

is theodlite same as clinometer

Answer 1

did you meant inclinometer? If so , no they are not the same because a theodolite measure horizontally while an inclinometer measures vertical angles with respect to gravity.

Answer 2

Today's theodolite does a lot of things:
Measures horizontal angles
Measures vertical angles
Measures inclined distances to sighted object, and conversion to horizontal and vertical distances.
It also has various programmes to do traverses, memorizes reference points.