When renting a car in the US., you should take care of a few details. Cars are rented out for a day, a weekend, a week or a month. The quote is usually not all-inclusive. Generally, you have a limited number of free miles after which you will must pay extra. Also, most international students do not have auto insurance.
All rental agencies offer auto insurance at a price.
I recommend that you buy it. No insurance is offered on the older cars. Older cars cannot be driven any further than Cleveland. Twinnings also delivers cars to you on week-days. This is generally regarded as dangerous and stupid.