Tab is easier for me to read than strict sheet music. I'll explain how they are read.
E -------------------------------- high E string
B -------------------------------- B string
G -------------------------------- G string
D -------------------------------- D string
A -------------------------------- A string
E -------------------------------- low E string
The numbers that correspond to each string represent the fret number on the guitar, so:
E -0------
B -0------
G -1------
D -2------
A -2------
E -0------
Means that you leave the low E string unfretted, while fretting the second frets of the A and D strings, the first fret of the G string and then you leave the B and high E string unfretted. What I just wrote was a chord, when all the numbers are lined up on top of each other that means they are played together. When they are not lined up on top of each other, the notes are played individually.
Hopefully that was helpful.