ALSO, TOO

Both ALSO and TOO mean "también".

TOO appears at the end of the sentence:
I'm tired. My children are tired, too. (My children too are tired)
She works from Monday to Wednesday. She sometimes works on Thursday, too. (Too, she works...)

ALSO is occasionally found at the beginning of the sentence, but it usually goes with the verb, in mid-position.
Do you remember the position of adverbs like always, hardly ever, etc.? Before the main verb, after the verb TO BE. Well, that's what we call mid-position, and it's the same rule for ALSO:

My sister sings in a choir; she also plays the violin. (Before the main verb)
He can play rugby and football. He can also take very good photographs. (Before the main verb)
She's young and beautiful --she's also very vain. (After TO BE)