Check out this wonderful link from NPR that gives you a first listen to Bob Dylan's: "The Witmark Demo's 1962-1964". This wonderful 50 song collection is truly magical. All recorded before the age of 24 it shows the raw talent of Bob Dylan. You really get the folk feeling that Dylan first started with that made him such a great artist. If you are doing anything today other then listening to this you have failed.
Check out this version of "Mr. Tambourine Man".... just amazing.