Yes, call them up and cancel your membership.
Good luck on that.
Once AOL has your credit card number, they continue to charge it no matter what.
Yes to all of the above.
If you are concerned about the switchover from AOL to an ISP find a friend that already has an ISP and have them help you.
AOL is the biggest waste. It is meant for people that are afraid of computers. They market it that way. Yet it is not any easier to use than an ISP and a good browser.