I agree, if he's climbing out, put him in a bed. You don't even need a toddler bed. We never had a toddler bed for either one of ours. We just had a twin bed, and pushed it up against the wall and put a guard rail on the other side. They still manged to fall out of the end of it once or twice though, then they figured out how to stay in it.
I moved my son from his crib at the age of 18 months. we bought himm a car bed. That way it still has the raised sides so he don't fall out. But he can come and go with out falling and hurting himself.