Most of us think about house training as being a puppy issue, but even if you bring an older dog into your home you still need to teach them where to potty. The steps are the same for a puppy or a new older dog and you are going to want to make sure they are house trained before you give them freedom in your home. The key to successful house training is to make sure that your new dog learns that the ONLY place that is acceptable to use as a potty is outside. The responsibility to ensure that happens is yours, not your dogs. Dogs don't come to us hardwired knowing to go potty outside, we need to teach them and a really big part of teaching them that is by NEVER letting go anywhere else. The only way we can do that is if we know where they are at all times.
Some products to help with house training: