Clara HD New to the world of Kobo...

I got my Clara yesterday and spent a lot of time browsing around the neighborhood. I got a few books transferred via Calibre, but am a little confused about some things.

1. Are shelves the same as collections?
2. Which driver should I be using in Calibre thekobotouch or thekobotouchextended?
3. Am I understanding correctly that to get calibre to create collections/shelves on the clara automatically I have to create custom columns in calibre?

I created collections based on the series of a group of books, but, I did that on the reader. Also, is there a way to remove books from the main list if they're listed in a collection?

I've given myself a headache reading and re-reading posts here and help files in calibre.

Thanks