Free means they were generous and caring enough to offer it as a contribution to society's knowledge. Gee, you must never use Wikipedia, since it's so "bad" they give it all away.

Free means free to use for any purpose you want. Free to share with other people. Free to modify. Free to share you modifications.

Yes.

Free means you are free to make it how you need it to be.

No, free means, good things can happen.

Free mean good enough to be a present.