Puppies can't hold it long, so if they pee inside, it's really not the puppies fault but the owners. It's our job to anticipate when they might need to potty, and take them outside.
Absolutely! And they learn very quickly if there is consistency in taking them outside. My girl Tamu learned in less than two weeks, and she was very young when we got her (7 weeks, which is not recommended, but my 7 year old girl, Lady, pretty much adopted her and taught her manners).