If you are over age 18, you can get a driver's license and drive your own car. You cannot drive the host family's car. You will also need to get your own auto insurance to cover you and your vehicle.
If you are under age 18, you cannot get a driver's license or drive a car. Please see the Student Code of Conduct for Students under age 18. "For sake of student’s safety, Students under age 18 will not obtain a driver’s license or permit, purchase a vehicle, or operate a motor vehicle during Program Enrollment Period."