Hello Fuluchenn49
As you are mentioning your ski equipment, I assume the main purpose of your Switzerland visit is skiing.
For the journeys
- Geneva Airport to Zermatt
- Zermatt to Mürren
- Mürren to Zürich Airport
a Saver Day Pass each is the best ticket option. If you book it now, you can travel for as little as CHF 52 (full fare). The price for the Saver Day Pass is raising the nearer the travel date, so save your pass as soon as pratical; I would need your exact travel dates in order to give you precise price indications.
https://www.sbb.ch/en/tickets-offers/tickets/day-passes/saver-day-pass.html
I suggest you downloading the SBB Mobile App. It has all train schedules. If you look up the connections you will see that the app is suggesting point-to-point tickets, while just below the p2p tickets, there is the Saver Day Pass offer. Add co-passengers on tab Profile if you want to purchase tickets for fellow passengers.
For your stay in Mürren, I assume you will have a ski pass. Depending on its type, you might be able to use it for all public transport services in the Jungfrau area, hence the purchase of another pass would become obsolete. Alternatively, the Jungfrau Travel Pass could be a viable option for you:
https://www.jungfrau.ch/en-gb/jungfrau-travel-pass-winter/
Let is know, should you have further queries.
Kind regards and best wishes for 2024,
Roland