I don't see the point in AppleCare, but you have plenty of time to decide on that one. Buying a case is the best protection, get a good one, it'll be with you a long time
That's a cool deal. In the US, there is just one educational discount. It can knock between $50 and $200 off the price of the machine (depending on the machines original price). It's also good for knocking around 30% off the price of AppleCare. Nothing free.