Need help with automotive studio setup

[orangeco]

Hello all, my first post here. I want to setup a small studio to photograph cars for a company that sell them. The studio would be based in their showroom, which is a converted barn with white walls, white floor but no ceiling, just a barn roof.

They already have a Nikon D40. I want to know what other kit they will need to produce images like the ones I have posted below.

The questions floating around my head that need answering are:

What lighting do I need?
What other bits of kit will I need?
Do I need a special paint on the walls and floor?

I am on a tight budget, the mission is to do this under £500.

I appreciate your tips and guidance.