Fresh fruits and vegetables are always available, and packaged health foods and cereals are available at the supermarkets. Yes, unless couples accommodations are specifically requested. The room and board fee relieves you of any other obligations. Some of them yes, some no. Obviously some are closer than others, but a great variety exists and there is not problem walking to both drug as well as grocery stores.
Some people do, it is nice gesture.
You could also pick up something there for the same purpose, but is not necessary nor expected. No, although there is usually at least one person around who speaks enough to communicate in an emergency. The directors do, yes, but they will do their best to avoid it with you in an effort to help you learn. Everything is available at the local supermarkets. Couples and friends who wish to stay with the same family are always placed together upon request.