Como S. Giovanni is the train station in Como - see location on map.
It's about a 10 min walk from the center of the old town, 15 min walk to the ferry. Buses and taxis pick up from the front of the train station.
Travel times to Swiss destinations:
Luzern 2h17 to 2h35, 1-2 changes
Zürich HB 2h35, direct or 1 change
Travel to Italian destinations
Milan city (Milano Centrale) 41 mins, direct
Milan airport (Malpensa Aeroporto) 1h30, 1 change
Venezia 3h30, direct or 1 change
Firenze 3h, 1 change