Alright, it's good you don't handle your toads. That can be a major stressor.

A vivarium is any tank or cage that is a home for your pet, and a terrarium just has an earth element. So both. You should try and do at least a half and half water earth setup, though the best is a two thirds water setup. What you could do is get a big tupperware container and fill it with water if you can't do anything better, one of the larger ones so it'd take up about half the tank.