As far as I know, it is not possible to transfer the tickets to your account.
Regarding the upgrade: If you are travelling with a Half Fare Travelcard and a 2nd class Saver Day Pass, you can buy 1-day class upgrades for journeys in 1st class as well as discounted route-specific (Saver) Class Upgrade. If you do not have a Half Fare Travelcard, you will have to pay the full price for a route-specific (Saver) Class Upgrade.
If you need assistance, please contact the SBB Contact Center: Tel. +41 848 44 66 88 (CHF 0.08/min.) (available 24/7, sometimes you may be required to wait)