Hello Listornets,
Welcome to JEvents!

.
From what I understand from you message, is that you want to allow users to register for an event is that correct?
If so with RSVP Pro, you can indeed create registration sessions for single events for a group of repeating events and for each repeating event.
The standard functionality of RSVP Pro does not include a cart. However, with Virtuemart integration you can include a cart which may meet your requirements?
You may find this useful:
http://www.jevents.net/products-new/add ... -pro#demos
Many thanks
Tony