Vaccum the car seats and floor. Clean the leather with damp warm water microfiber cloth. Than wax the leather with either leather wax, dashboard wax, leather shiner or something along those lines. Same with dashboard, steering, and door panels.
If you have the CVT than also wax the gear knob, don't do this on manuals because your hand mights slip, same goes for the pedals. Just clean them with the damp water cloth.