As well: He speaks English as well; Hot and cold as well

Hi,

  1. Same meaning or not?

a. He speaks English as well.
b. He also speaks English.
c. He speaks English too.

  1. What is the meaning of “as well” in:
    a. This is hot and cold as well.
    b. You can have this one, but you can’t have that one as well.

Thanks
K