Walk through everything needed for MonetizeNow to charge a customer's card or bank account automatically: payment settings, the payment gateway, the customer's payment method, and the bill group.

Four stops: Payments settings, Payment Gateway, the customer's payment method, and the bill group. About 5 minutes.
No. You can check Collect Invoice Automatically first. Nothing is charged until a payment method is selected on the bill group.
Credit Card and ACH Direct Debit. Bank transfers can't be selected on a bill group.