How to make a car?

I want to make cars but I can't make them the thing i don't understand it's when i''m making the body of the car i should make it Anchored?

1. Add a brick.
2. Get some wheels.
3. Connect the wheels to the base brick.
4. Weld the wheels to the base brick

That should work, if not don't weld the wheels.

Sometimes when you are building a car, welding sometimes makes the wheels not move, so I sometimes glue mine. It does not really matter because you just want the wheels to stick. Anchoring it makes that part stay in that place of your game and it will not move no matter what, I would not prefer that.

I should make all parts Anchored or not?