Tonto was the Indian who found John Reid after he almost died from gunshot wounds caused by an ambush from outlaws. Tonto nursed him back to health and together they joined to fight for the innocent of the old west. Tonto is one of the very few who know the Lone Ranger's true identity.
His helping of the Lone Ranger is because of the Lone Ranger's strength of character and his will to help those in need. Tonto is starting to slowly to realize the importance of friendship and helping others.
Jay Silverheels played Tonto for many seasons on The Lone Ranger television series.
Disney did a movie about the Lone Ranger but they made the mistake of casting Johnny Depp and it was filmed like the pirate movies from Disney. It was a BIG mess.