ticket can be purchase from the 'news stand' too. Be sure to get the "B.R.I.G" type of ticket (It was 9EU), which allow you to use the local transit as well.
Take the slower train, which will stop at the Vantican, on stop before the Termianal.
Check the return schedule back to port, the track is at the far end to the Terminal, which take close to 10 min walk.