Renting or buying a bicycle
Netherlands the land of the bicycles you could say. There are more bicycles in the Netherlands then there are people living in the Netherlands. The Dutch people learn to cycle from very young age and are used to do as many things as possible with the bicycle.
Renting a bicycle
For renting a bicycle there are several options dependent on your needs. If you need a bicycle to go from a central train-station to a location and later you come back at the train-station you can rent an ov-fiets. It can be good for easy bike rides and short distances. Expect a sturdy heavy bicycle which just works. The bicycles have good locks also.