For basic information, try this link to Kobo's help site:
PDF version of Vox Guide here:
Also, there are a lot of posts in this forum that are very helpful for new Vox users but nothing "canned" that will list everything out in one post. I suggest you do a search of the Vox forum (click on the Search This Forum in the blue bar just above the posts) on the topic you want answers for.
Download from one of the places below, Aldiko: for DRM'd books both purchased and library books, Kindle app for Amazon books, Kobo app already there for books purchased from Kobo
(click the download link for "regular apps")
Sorry about the number of UK posters but I'm sure you'll find us Canadians very helpful just the same... The Vox was launched here in late October so although I'm sure there are a lot of UK readers, many might not feel the same need to post as many of the answers people are looking for have been covered in older posts.