2B03/2BB3: As long as you go to class... you don't need the text book. I used it once all year, and did really well in both classes. The class notes are all you really need. Its good to have if you need clarification on things, but you can easily google those things.
Orgo: I would say get it, I didn't fully use mine to their full potential and my marks suffered because of it i think.
Chembio 2P03: I would say def get it for the practice questions.. the content is covered well in class, but you do need to practice a lot, as most of the questions in the book are similar to Kruse's test questions... so i would highly suggest getting it