insulating the outer walls will have more effect for energy savings. you can probably assume the adjacent units will be climate controlled. if you are talking about for noise reduction, maybe that will work. a lot probably depends on the actual construction.
i say repaint for sure. kitchen looks dated, id consider redoing the cabinets (paint? i dunno) and new appliances
I'd go a grey and white baseboards...you really need new cabinets and new appliances!
Had the home inspector come today, everything looked great! Electricity is excellent, the furnace and heater were replaced in 2006, and no plumbing work needs to be done 🙂. Only 1 window needs to be replaced because of a crack. Just needs some good paint and a kitchen re-model! 😀
He told me the insulation in the walls was excellent, and nothing needs to be done.