Alright so I have a model car, which 'body' objects am I required to use to get the thing moving?
It needs to move forward constantly and swerve side to side as buttons are pushed accordingly, does that mean it needs an angularbodyvelocity thing?
Also do 'body' objects even work for whole models?
BodyAngularVelocity tries to make the object spin.
What you want is a BodyGyro to control the direction the car is facing, and a BodyVelocity or BodyForce to push the car in that direction.
Body objects need to be placed inside a part in order for them to exert force. Placing them inside a model won't work.
The really old car tools use body objects for movement, so looking at the source of one of those may be a help.