No one can tell you exactly what you will need, as you will probably study differently than most.
I have a huge bag and fat binders, as I print tons of stuff out (at school, at home is too expensive) and write and highlight like a kid with a coloring book. Love it. I have 1 big 3" binder for each class, and purge after each exam, as it's maxed out by then.
What is your study style? Do you learn by writing diagrams and pathways in their entirety? Perhaps you'd like a dry erase board.
If you are visual, get ready to plug into YouTube and Khan academy with nice headphones. Love flashcards? Buy those little white squares in bulk.
I dislike macs and prefer windows. You perhaps are the opposite. Take what you studied with, how you studied, and get ready to hit the ground running. Adjust after your 1st test. Best thing you can do is stick with what you know and try other things if you want to tweak.