first off dont let him run the house with any new dog he should be on a leash at all times in the house till he can learn not to go to the bathroom in the house will take some time and when he goes to the bathroom if it was my dog i pick them up by the cruff of ther neck walk them over to the area and a light smack on the nose or butt works then right out side it will be a pain but u have to stay outside till he goes agin then prasse prasse him tell him he a good boy for going outside and bring him back in but like i said he should be on a leash at all times when in the house till he learns