Piano
Tchaikovsky was 6 when he learned
Tchaikovsky played the piano, and could play all of his own piano music and many pieces by other composers. His favorite composer was Mozart.
The piano and the flute.
From his two cousins he would play piano with as a kid.
He started taking piano lessons when he was five.
he played the pan flute like no other and played the recorder moderately okay.
he taught himself how to play guitar and piano and drums,trumpet =)
Beethoven's father taught him how to play the piano and the organ.
Piano
Justin taught himself how to play guitar, piano, drums, and the trumpet
They self taught themselves guitar and had piano lessons at a younger age I believe.