The jumping up is him trying to communicate, express how he feels etc.
You're spot on that turning away is neither practical nor helpful, he's going to get more frustrated than he already is and likely to pull/tug/bite etc, more.
Pre-empt him, pockets full of treats you can lob - as he approaches, do not wait and see for the moment, just lob some treats which will redirect him briefly - you can then grab a toy, figure out what he needs, find a longer lasting distraction or lure him to sit or down or whatever it is you'd prefer he did.
Over time he then doesn't get to practice the behaviour you don't like and he does learn behaviours you do like and you avoid frustration.
For looking on the worktops, even though he is responding to 'off', I would just move everything off them, and ignore and when he looks at a work top but doesn't get up OR when he gets up, has a look and then gets himself off... THEN reward that, so he doesn't learn the annoying sequence 'if I get up on the worktop, I get told to get off then i get a reward, hurrah, I'll repeat that'.
When prepping food etc, multitask it, lob treats at his bed so he realises that the bed is where the food happens, not under your feet/grabbing it off you. You will need to chuck fast and have non-bouncy treats to start with as it will take a few sessions for him to realise. Don't use words here, actions speak far louder anyway!
Nighttime - I'd sleep with him and I'd be doing that until I think he's grasped the 'how to ask for the loo' and isn't liable to eat cushions. Adolescents go through several needy stages even if they haven't got his history, and the key thing at the moment is him developing that bond and security with you - thats your platform, your foundation for literally everything else.