how much money do i need to install racing gaming equipment, steering wheel,chair,brakes?

How much do you have?

You can do it for under $1k, you can do it for $100k. Your best bet is to figure out a budget and work from there.

Example: You can do a Logitech G923 for $350, and a Next level racing F-GT Lite for $300. Thats about as cheap as it gets. It does the job. Check the racing rig link in my sig for something more upscale.