To start with nature may not make the car so heavy that only 1% of the energy is used in moving the driver, while 99% is used for moving the car itself. It would probably make the car with materials such as carbon fibres which can reduce the weight by two-thirds.
Nature would probably make the process of creating the car simple and resource efficient.
A car made with carbon fibre will require 5 to 20 body parts instead of steel-based cars that require 200 to 400. The body parts would fit together with glues instead of welds. They would be light in weight and therefore easy to manoeuvre during production.