hydraulic pump

I want to get this for my car but i dont know what i need to install them like do i need new wheels, springs etc... also hydraulic are oil pumps are there air pumps that does the same as hydraulics?

also i need some website where i can get them thankz

What kind of oil pump, for what purpose?

There for a car, they lower/raise your ride when you need - yes its a oil pump with solenoids