Can I say,
1 Almost everyone has been to school, including me.
2 Almost everyone has been to school, me too.
3 All of us have been studying in a school. I also have been studying too.
We generally say "go to school." We use "be to a place" to refer to some place you get to know by visiting:
4. My children have been to London, but I haven't.
including me is correct and equivalent to me included.
Me too cannot be used at the end but in reply to a sentence said by somebody else:
2a. Almost everyone has gone to school.
2b. Me too.
As regards (3), "also" and "too" are redundant. You can use one or the other, but not both at the same time.
Location: Santa Cruz, California, US
I would actually take Gustavo's point a small step further.
"Me too" doesn't make sense because it implies that the person referred to as "me" cannot be considered part of the group of people described as "almost everyone".
Thanks for your all helps.
The correct way:
Almost everyone has gone to school, including me.