Yes, scales. There should be all kinds of blues and country (yes, country) tabs out there.
"One day I was listening to a DJ play Presley's 'Blue Moon of Kentucky' - I turned the radio up and shouted, 'That sounds just like us playing!' At last someone was recording country music with a beat. That's what Rockabilly music, or Rock & Roll was to begin with - a country man's song with a black man's rhythm. I just put a little speed into some of the slow Blue's licks." -Carl Perkins
All the 60's garage guys learned from early rock and rollers and blues guys (Chuck Berry, Little Richard, Bo Diddley, Muddy Waters, Howlin Wolf, etc). Learn those and songs and you'll know half the stuff from the Beatles, Yardbirds, Animals...and the list goes on