Study up on your calculus first - it's important to have a very clear understanding of it. Your class textbook should be adequate to begin with, but I would recommend simply watching videos on the concepts rather than committing yourself to the early study of a textbook.
Physclips is a useful resource made by my own uni's first year lecturer. He gives fairly useful and upbeat explanations, and I believe you would get a good overview of standard first year topics.
Of course, as well as (or instead of) Physclips, Khan Academy is always worth checking out. He has a lot of videos on Physics and you can trust that you'll be getting excellent explanations if you go there.
While I'm not familiar with that specific textbook, I do know that publishers often try re-numbering and slightly altering homework problems to confound students that have older editions (nasty, I know). While you may have to wait a few weeks for shipping, I'd recommend searching for the "internation edition" of the current edition your class requires.
International editions are often softcover versions printed in b & w meant for countries where $150+ for a textbook is not economically viable to students or the publisher. Sometimes the cover may be in a foreign language, but the actual text will be in english (this should be confirmed by the seller).
A quick google search brings up this result for a recent eidtion of what I assume is your textbook. I'd double check to make sure it's the right edition (see if your school's bookstore has the ISBN to double check the edition/printing).
Hope that helps.
Can't find any mention of an electronic version being published at all.
If you don't want to buy it for full price you could, assuming you already checked your local libary, rent it from Barnes & Noble.
I'm a big fan of Hand and Finch.
Pros:
1. Jumps right into Lagrangian mechanics; doesn't spend any time reviewing Newtonian mechanics.
2. Includes "modern" topics like chaotic dynamics, action-angle variables, KAM theory.
3. Chapter on relativistic lagrangian mechanics.
4. "Advanced" for an undergraduate book, which is probably what you're looking for if you're self-studying a whole course?
Cons: None
Disclosures: I used this book for my mechanics 1 course and loved it, and I've never used another undergraduate level mechanics book. I've flipped though the "standard" mechanics books and managed to convince myself that "my" book was clearly better.
You can get an eTextbook version from Pearson at http://www.mypearsonstore.com/bookstore/mechnics-of-materials-coursesmart-etextbook-0133254690 , or a physical copy either from Pearson or Amazon (http://www.amazon.com/Mechanics-Materials-Edition-Russell-Hibbeler/dp/0133254429). If you want a free copy, check your library.