If you are under 18, you will be issued a probationary license. To maintain this probationary license correctly, you are only allowed to licensed passengers who are 25 years old or older in the car with you. Additionally, during the first six months after you have received your probationary license, you will not be able to drive between 10 PM and 5 AM.
The documents that you will need vary depending on the insurance company to which you apply. Generally, insurance companies want you to submit proof of your identity, your driving record and information about the vehicle you would like to insure.