Asking classmates for help is not a bad option. If they are generous enough to do this, take the offer with grace and gratitude. You can always thank and repay them later, but many times, people will help each other out for the greater good. It's not forever: only 6 months left! In the mean time, you can try other means of financing the repair or a new vehicle (or other alternative modes of transportation?). And yes, make instructors aware of the situation if anything should happen and you miss or need accommodations.
If I were you, I’d make your clinical instructor aware whether your classmates agree to give you rides or not. Crap happens and rides can fall through at the last second. Better to make your instructor aware now than show up late one day because your ride fell through and seem like you’re making excuses.