What was Paul McCartney's first instrument?

Answer 1

Paul McCartney's first instrument was a nickel-plated Trumpet, which he never mastered. He sometimes tried to include it in the Quarry Men's music. McCartney played a little in George Harrison's "Only A Northern Song"

Answer 2

His uncle George Smith gave him a harmonica as a boy, which he played nonstop during a bus ride to Scotland to visit his Aunt Mater. The bus driver gave him a better harmonica after they arrived.