About learning to drive?

Does the driving theory test for cars also allow you to drive motorbikes or are they separate? I am taking steps towards getting on the road, due to funds shortage I will have to take the long route by renting a moped and probably working my way up through motorbikes to get road experience as opposed to having lots of driving lessons…I have already had quite a few driving lessons in the past.. I am good with the actual driving of the car i just lack experience of being on the road…(this is important as i cant afford to fail and retake the test multiple times) I had previously taken my theory test but it has expired so I need to take it again….also I know you can rent mopeds but has anyone ever herd of renting motorbikes long term?