Is it possible to setup a printer without internet? Or all printers need internet?
Almost no printers need internet.
You may need a router, but not internet.
You may need you to download the driver, but you can do that on another computer and then transfer by disk on key to the computer that you need the printer to work with it.
You may need to connect to it by cord, to the printer, or wirelessly, but not neccessarily with internet.