As everyone said, the first step to the night photography is the tripod.
Once you have the tripod, since you will be using one, turn the ISO down.
The ISO down will force you to up the SHutter speed to capture proper light, but if your using a tripod you can use the shutter open for 40 seconds if you need to.
When the ISO is down you will have less noise.
Another thing you can mess with is Aperture. The Aperture controlls how much of the background is in focus. If you notice, alot of professional photographers, when taking images of bugs or a flower or something liek that they will have the background blurred. It is a pretty cool affect, the way they do that is with a very low aperture.
The lower the aperture the less in focus the background will be.
If you want everything to be in focus, You want to put the aperture as high as possible. Howver, the higher the aperture, the slower the shutter must be to capture the right amount of light.
So if your in a dark area and you want to use ISO 100 with an aperture of 32 you may not be able to depending on the camera so you may have to bump the iso up a little bit.
Theres your photography lesson in a nutshell
By the way the car looks great. It was nice to see what it came out to be after all the step by step photos Stef showed us.