It's not fair that fare means three unrelated things. As a verb, it means to proceed or get along, as in "Fare thee well." As a noun, it can refer to the cost of travel ("Train fare is ten dollars") or to food ("Tatertots are typical cafeteria fare").
To remember fare's different meanings, think of how, for people living close to the bone, the question "How are you eating/faring?" is not so different from "How are you getting along/faring?" And when you pay plane fare and fly to France, you will most assuredly be eating French fare once you get there.