If your dog drinks a cup of water, then urinates in the house 30 minutes later, begin taking the dog out after watering. Also remember, dogs have a much more acute sense of smell than we humans. All pet stores sell special odor killers that, used properly, are both safe and effective. If you have questions about house training or crate training contact a trainer or rescue in your area. They will be happy to help you through.
All dogs chew.
Whether they chew on the appropriate item is up to you. It is up to you to provide the appropriate item for that chewing. Your vet can recommend the best type of chew items for your pup. An older dog can be trained to chew on the proper items as well. Again, you must provide these items for your dog.