Which “too” means “also”?

Q. Do I want to, too, or two when I want it to mean “also”?

Adam answers:

Too. Too means also, as in “I want one, too.”

“Too” can also mean “more than normal” or “more than expected” as in “The soup is too hot.”

As for the others, “to” is a preposition that can be used many ways but not to designate “also,” and two is the spelling of the number 2.