Unless you intend to explore every nook and cranny of Graubünden or some of the more remote valleys, you will not really need a car. In fact, a car might cost more time and irritation than simply using public transportation. Virtually every village and major cable car, funicular or ski area is connected either by regular train service of the Rhätibahn (Rhätische Bahn or RhB, for short) trains or Swiss Post buses. On occasion, hotels often have pick-up service (the Stern in Chur uses a beautiful 1930s Buick, a genuine "station" wagon). Note that if you intend to use public transportation (recommended) a fair amount, you should consider purchasing a Swiss Pass or one of the many other options. For example, an 8-day Swiss Pass (giving you unlimited transportation on trains, buses, and ships; 50% discounts on many funiculars or cable cars; plus entrance to museums and many other perks) costs 362 SF. Compare this to the basic cost for a car rental: about 680 SF for 7 days—and you haven't tanked up yet or paid for parking.