Hi,
I highly recommend you take the Tutorials and read the FAQs at the HELP page (link at top of page).
It's not required to have a Master Profile to start listing. That's something that can help speed-up the listing creation process, i.e. it helps to create those sections in the one-page lister that you consistently use and a Master is great for those combined situations, where a specific type of listing is used.
I'm US, but I do recall a setting in the MY ACCOUNTS section for a Canadian seller to set either US or Canadian dollar for listings.
Hope those tips help.
Danno