Lugano is in Switzerland and not Italy, so if you're taking the train from Italy you will need to have your passport with you.
A funicular links Lugano station to the town centre.
There is direct access to this funicular from the passage way thay runs beneath the platforms.
If your train arrives at platform/track 1, you will need to descend to the lower level in order to access the funicular.
This is one of more than 300 station guides available on ShowMeTheJourney, which will make it easier to take the train journeys you want or need to make. As always, all images were captured on trips taken by ShowMeTheJourney.