Well with the peeing in the house, that's all he knows for now and it will take a long time getting him used to going outside. I would put one of his pee pads outside and see if he will go on it. If he does then slowly move it to the grass and after awhile he should get the message. As far as him chewing things up, he is bored and if they are not crated when you are gone, they will find things to entertain themselves with. They will eventually grow out of it, but it is a long time before they do. I would try to crate train him again. Just do it a little at a time until he gets used to it.