The hotel is at walking distance (about 600meters) from the Salerno central train station: keep left when exiting the station (or walk straight to the seaside and take a left).
To reach Salerno you can to fly to Naples Capodichino. As an alternative you may consider Rome Fiumicino. In both cases the next step is to take a train to Salerno.
From Naples Capodichino you can reach the Naples central train station with the “Alibus” shuttle: it runs every 20 minutes (schedule). Cost is 5€ and the ride is about 15 minutes, but the time heavily depends on traffic.
There are plenty of trains from Napoli to Salerno; travel time is approximately 1 hour.
From Rome Fiumicino you can reach the Rome central station “Termini” with the Leonardo express. It runs every 30 minutes. Cost is 14€ and travel time is about 30 minutes. Again there are plenty of trains to Salerno; travel time is is approximately 2 hours.
Trains schedule can be checked with Trenitalia.