Is rigging a car the same as rigging a character? Like the rigging character tutorial (Helldog)?

It depends on whether your car is realistic, or going to be in Cars 2.

If it's going to be deforming, then you will likely want to paint weights.

If not, then you can probably get away with a more technical (by that I mean non-deforming) rig.

Are there any tutorials in rigging cars that you might know of… I have an idea on humans, but I'm assuming that rigging a car is completely.

Maybe you should have a look into ‘Technical Rigging’ series by 3dBuzz.com.
In part 5 you learn how to rig a vehicle.

Cheers