talkphotography.com is a good place to start
I would start playing with Aperture priority or Shutter priority and see what the different settings result in.
Aperture (f-stop) - determines how much light is allowed in via the lens.... low f-stop means 1.2, 2.8, etc means that the lens is wide open and light floods in. This works well for low light situation or fast moving subjects. Can lack quality and depth of field (so only a small percentage) of the photo will be in complete focus. High f-stop means 32, etc means that a the lens is mostly closed and only allows a small amount of light in. Light is how the camera renders the picture. Most lenses will have sweet spots around 7/8 - so reasonable amount of light, depth of field, etc
Shutter 1/1000ms - determines how long the shutter remains open, again controlling the amount of light allowed in. Low is again good for fast moving subjects or low light.
For static car - you need to find the sweet spot of your lens and stick to that, always on tripod, always with remote control, low ISO value, medium depth of field, etc. Since subject is static and shooting for tripod, you really shouldnt have to worry about the shutter speed.