We plan to travel between Verona and Innsbruck on successive days. Verona-Trento-Bressanone-Brenner-Innsbruck.
I understand that for the Frecciarossa trains we would need to pay for a seat reservation so we would not get those trains. On some of the other trains there is (differently phrased depending on whether I look at Train Europe or the RailPlanner or Trenitalia) some trains that say that a supplement is required and a few where no supplement is required.
many questions are what is correct for non-reservation trains? For an hour or so we would not get the trains that require a reservation. Do we need to pay a supplement (I think we pay this at the station?) for each time we use one of those trains even though we are not crossing into Austria until the final day?