English-Spanish translation and Spanish etiquette?

I am about to call my host family in Spain. How do I ask "how long does it take to get from Madrid to Salamanca on the train?"

Also, is there anything I should be sure to say or not say to them for etiquette's sake?English-Spanish translation and Spanish etiquette?
驴Cuanto tiempo tarda el tren de Madrid a Salamanca ?



驴Cuanto tiempo dura el viaje por el tren de Madrid a Salamanca ?



Don't say "chinga " or "puta."English-Spanish translation and Spanish etiquette?
"驴Cu谩nto tiempo se tarda en ir de Madrid a Salamanca en el tren?"

good toner