I will be painting my kitchen cabinets (paint over an oak stain). Can I use a good quality latex paint or does it need to be an oil based paint?

My kitchen cabinets are in good condition. I want to paint over the oak finish. Do I need to sand them first, or would a good scrubbing with a teflon sponge be enough?

Red brick with some black. The roof is black and the trim and windows are natural which is beige. What color front door would you suggest? I am painting the shutters black. The back door is going to be painted a little darker than the beige.