College of Western Idaho Bookstore

No you can call and see if they have it or check online but you can just walk in and buy it at the counter the staff there is really helpful, also I would bring your schedule because you may have already paid for the book in your course fees and in that case you can just pick it up after finding a staff member they will help you out greatly

Yes you can

They are seperate

You'll want to register for classes for the next semester through the CWI.edu page. Once you're registered for classes (make sure to click the registration button and that it says 'enrolled'. You can click on the course and at the bottom of the description is a button that says "bookstore". Click that and it will show you the books you need for the class or if the class in "includED" then the textbook is free, just bring you schedule to the bookstore and they'll help you out. Make sure to look for what textbook you need through each of your classes. Pro tip: look on facebook for a textbook exchange and you might be able to buy some of your textbooks from someone who took it the semester before. Make sure it's the right edition and series though. Renting textbooks is the second best choice. Congratulations on taking a step toward getting your degree!

Call CWI bookstore I'm sure they can answer your question better than most of us here.