Costs:
A stunning, majestic, mountain utopia is a good way to describe Switzerland.  However, there is a price to pay for living and vacationing in one of the most beautiful country's in the world. For two people hiking the APR, taking occasional post bus or train transportation, and planning at least one meal out per day and staying at Inn's & B&B's (or hostel's & mountain lodges) plan on spending, at the least $100 US per person, per day.  However, if staying at fancier lodging & eating more meals out, budget for around $200 per person per day. You can save money by staying in some dorm accommodation, camp at designated camp spots outside of towns/villages, ask local farmers if you can camp in their field provided you have a tent (leave no trace), & purchase food from grocery stores and local markets. Most everything you purchase from coffee, food, to batteries are more expensive in Switzerland. However, some items are reasonable and you can save money by following these tips:

-Shop for food at local Co-op's (grocery stores), cheese, & butcher shops selling cured meat to self cater meals. Many lodges include breakfast with the cost of your room but it's always smart to ask ahead.  Typically the cost for a typical Swiss meal such as Rosti,  or roast chicken with potatoes and seasonal veggies will run you around $20 US each.  

-Coffee can be quite expensive in Switzerland, especially in the larger towns where I paid around 6 Swiss Frans for a cup, however typically you will pay between 3-4 Swiss Francs for an espresso.