1. How early do I need to be at the train station before departure to a neighbouring country?
The leg is as such: Geneva Airport > Geneva > Milan > Florence.
Is arriving half an hour before train departure enough time to get my ticket stamped/validated at the station? e.g. arrive at 12:30 for a 1pm train at Geneva airport.
(Is there a difference for international/domestic trips?)
2. Is it possible to store luggage next to my seat? If not, what is the allocated storage space?