Every traffic school is privately owned. They have different prices and locations. What you can do is call around and see what they offer. Every school on this website is DMV licensed.
No. Only the Court that you were cited from can grant an extension. You need to contact that Court.
Pursuant to AB2499, which was passed in the 2009-2010 legislative session, effective July 1, 2011, traffic violations where a defendant has elected or been ordered to attend a traffic violator school will no longer be a dismissal on the driving record. They will now become a confidential conviction. A confidential conviction will mask the violation from your public record. Insurance companies will not see the confidential conviction.
Yes you do. What you paid for at the Court is your fine plus an administration fee to attend traffic school. All traffic schools are privately owned and vary in price.