sorry if this question has been asked before, but i just need to know that if paypal has reocurring billing every month

and also when i click on some links it shows a page with the fields to enter cc info and address, does that mean they don't have to sign up to pay?

and also what are their charges for trans and other stuff

Most of this is found on their web site (oddly enough).

reocurring billing: yes
don't have to sign up to pay: they do
charges for trans: see site