I want to set up multiple methods of payment such as by check, credit card, PayPal, etc. How is this accomplished?

4) I want to set up multiple methods of payment such as by check, credit card, PayPal, etc. How is this accomplished?

Please follow this guide on How to Create a Basic Multiple Payment form. You can also check out this demo form to see it in action: http://www.jotformpro.com/form/41363533068958 

You can also check out this guide on How to Show or Hide Fields Base on User's Answer.
Cheers.