Orange County Floor Kitchen Bath

I have old house and all electrical wires are aluminium.
The electrical panels or sub panels i have to small if i want to upgrade electrical panel with big size to fit more circuit breakers for doing kitchen remodel do i have to replace all aluminium wires for all house or just the area need to do remodeling and leave old aluminium wires already used in rooms and bath rooms,hallway,garage out side without replace

I am remodeling my kitchen. there are 3 layers of wall paper. Could I get some kind of wood covering for the wall space instead of painting?
The cabinets re new (a spice color) and the countertops are granite. the floor is wood.