Help stop a dog from chewing everything!!!?

We found a stray dog and if no one claims him, we were gonna keep him. We already have 2 other dogs, and one went threw the stage were they chew on everything and that was a disaster!! And My mom sed we cant keep him cuz the dog we found is still a puppy and is starting to chew on some pretty expensive stuff and he is just sooo adorable! I dont want to give him up, so I was wandering if there is any way possible to get the dog to stop chewing on are things, or any like way for us to teach him to not chew on things except for his chew toys and things...Thnx!! :D