City name is a city in Region name.
A coach from Salta takes about 12 hours and costs about 80 pesos, however it is difficult to get one at sensible hours, ie you have to either leave stupidly early or arrive stupidly early, the best I could find was 6pm - 6am, and the bus was an hour late, which suited me fine.
Eat at Fenix Cafe on Don Bosco and Guemes, they served warm bread and creamed Roquefort before the meal and servered the best canalones and salsa mixto in Argentina! Cheap too!
El Hostelito, recommended in the Lonely Planet and Footprint does not seem to exist any more, and I could not find a hostel.
Hotel Luxor a cheap hotel (23 pesos without breakfast) only a few blocks from the plaza.