Hi, This is pretty normal behavior for an unneutered male. He has realized he is safe in his new home and is free to explore. Neutering will Definitely help calm down this behavior, though it takes a month after the procedure to make a real difference. Bring your new little guy to a vet that’s good with rabbits (Exotics Vets) and schedule the appointment for his neuter as soon as your vet is willing to do it. More experienced vets often can handle slightly younger bunnies.
Get a plastic spray bottle and fill it with a 50/50% mix of white vinegar and water. Spray it on the bottom areas of the couch where he wants to get to. It won’t smell to you, but it is a repulsive smell to bunnies. Also, keep it handy because it is an excellent cleaner of litter pans, cages and toys, as long as you rinse those off after.
He will calm down more with age, in about 2 years, than the neuter, but he may always give you kisses. You are just getting through his teenager behavior for a few months now.