RE 1: Depends. How did you pay it? If you paid by check, enter a check. If you paid by ePayment, you can enter a check with a check number like "ACH" or similar, or enter a transfer transaction.
RE 2: The type of accounts is a Credit Card account, the account where you've recorded your Credit Card activity. I call my something like "Chase Visa" or similar, so I can keep the several cards strait in my head.