I'm basically going to repeat what other people said.

Keep him leashed with you at all times. If that's not possible, keep him in his crate. Do not allow him on the couch if he keeps peeing on it. The second he gets on the couch, tell him OFF and nudge him to get off. Be consistent about it... he'll get the point soon enough. How old is he? He looks to be old enough to be able to sleep through the entire night without peeing. Make sure the crate is only large enough for him to be able to turn around in it, stand up, and lay down comfortably. Make sure to take him outside right before bed time so he can last through the night. Good Luck with training him.