2002 Sequoia Foglights

I just purchased a used 2002 Toyota Sequoia SR5 4X4. the Sequoia does not have foglights installed. it does have foglight covers on where the foglights should be, and also a wiring clip attachment for the foglights. (disconnected of course). I plan to buy some foglights and install them. my question is do i need a foglight housing assembly to install the lights in the existing factory foglight location. also do the foglight work with the existing control or do i have to add a foglight switch. I will be purchasing original toyota foglights for a 2002 Sequoia. thank you for any help.:)