If I have yearly city pass do I deduct the actual cost of the pass (lower), or monthly cost * 12 months (higher)?
The actual cost, obviously.
Depending on where you are, an automatically deducted amount based on the distance between work and home could be higher than the actual cost.
With home office possibilities, it is possible that single tickets were used. Be prepared to show evidence if you want to deduct anything else than monthly or annual pass. In addition to this, I used to deduct bicycle for the trip to the train station. Depends on canton and tax man, what they will accept or challenge.