Advise for kitten training?

We've run into a few problems and dont know how to approach them. First of all he generally uses his litterbox but somehow feels the need to piss on blankets and cushions, yes he is fixed, so I don't think he's marking his territory.

Next thing is hes super wild all the time, but at night its problem because he attacks feet and faces when we sleep. Is it a bad idea to lock him in another room for the night?

And thirdly, when we say no or stop he usually will stop whatever bad thing hes doing but will attempt it again just a minute or two later.