How do you get a toad out of your house?

Catch him and throw him out. Try using a shoebox and a broom or something similar. Place the box in front of the toad and nudge it gently from behind with the broom. Most likely it will hop right into the box. After you have captured the toad seal up any holes that may allow the toad to regain access to your garage. Just pick it up and put it ouside.