What would be the best form of travel from Rome to Riccione to Venice and then to Sorrento and Salerno
Isn't this a duplicate of your last question? Which one do you want answered? It would be best to delete (you can do that when you are logged in) the one you don't want answered. That way you don't get confused and neither do your volunteer fellow travelers answering your questions....
Except for Sorrento-Salerno, take the train. Rome-Riccione requires a connection in Bologna. Riccione-Venice requires a connection in Bologna. Venice-Sorrento requires going Venice-Rome-Naples on Trenitalia trains and Naples-Sorrento on a Circumvesuviana commuter train. Sorrento-Salerno is a ride on a SITA bus. Salerno-Rome requires a connection in Naples.