You'll find modern patchwork families, parents of different cultural background, single parents, married couples with no children as well as the sterotypical mother-father-2children-dog family.

In the cities people live mostly in rented apartments whereas those living in rural areas own a house.

Your hostfamily will most likely have children of their own and they will host you for cultural exchange reasons - not for money! (YFU Switzerland doesn't pay host families for hosting.)