You can download the Swiss Travel Pass map to see what's included.
Yes, that works. The combination you're looking for is the Swiss Transfer Ticket Combi. Points of sale can be found by selecting that product on this page and clicking "Show results". Since you live in the US you can best buy it through either raileurope.com/transfe r-ticket-combi or raileurope-world.com/transfer-ticket-half-fare.
All you need to know about traveling by train, bus or car in Switzerland.
Hand picked Swiss hotels and other accommodations are right here.
Swiss Travel Pass promotion: 25% discountAvailable until 11 December 2021. Book 11 months in advance. Free cancellation.https://shop.switzerlandtravelcentre.com/#/en/home.