Saute pans have higher sidewalls than frying pans, which makes them better suited for cooking foods in more liquids without the risk of the liquids spilling over. A frying pan is ideal for shallow frying meats and vegetables with very little liquid. Despite its name, many chefs prefer sauteing foods in a frying pan over a saute pan because its sloped sides make it easier to toss foods.
It depends. Some manufacturers will label their pans dishwasher-safe, but for the longevity of your pans, it is best to hand-wash stainless steel pans. Dishwasher detergents can be harsh on the stainless steel and may lead to corrosion, and in general, regularly dishwashing your pans will dull and spot them over time.