2.Which car would you recommend for a person who travels only 5 miles to work each day?

How would I figure this out? Like... something about highway mileage?

Recommend - buy a bicycle!

However, you should be able to find the cost/mile form variosu web sites. The What Car web site compares cars, including the cost per mile figure. The 'pence per mile' figure is calculated on three years' or 36,000 miles of motoring. It includes depreciation of the car's value, road tax (UK), maintenance and fuel costs. As an example a Vauxhall Astra 1.4 SXI Sport Hatch the figure is 31p per mile.