1.
Some coder say: "If you can describe it, I can code it". So i'm sure that this is possible, but i haven't seen it yet.
2.
Your customers don't need there own paypal account. They can pay using their creditcard (Visa, Mastercard etc.) Only you should sign up for paypal (Sign up is free) and check if your currency is supported by paypal. =>
www.paypal.com
About the bank transfer: Maybe it's better to visit a bank and ask them to explain you how a bank transfer generally works. They will give you some "Wire Instructions". Those specific bank wire instructions can be placed into ClassiPress.