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.
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