Apr 14, 2014 - 11:52 AM
There should be Swiss personnel on board (at least when approaching Switzerland). In any case, the personnel should be able to help you with your pass. Of course you can also choose to purchase the pass from a reseller that allows to validate it yourself. See the Swiss Pass page I referred to. Go to the Prices tab for details.
Sure, you can either use a pass or a ticket in Austria. As long as you have tickets or passes for the whole trip, it's all fine.
You don't need seat reservations from Chur to St. Moritz.
Last modified on Apr 14, 2014 - 11:53 AM by Annika