What I want to learn about tennis...

I already know quite a bit about tennis, however there are still some things I would like to learn.  My essential question is: How has tennis changed over the years?  One of the things I wish to learn is where tennis originated.  I have been told it was in France, but I don't know for sure.  Also, I'd like to know who created tennis.  Another thing I'd like to know is how it was first played.  I've been told that tennis used to be played with the hand, rather than a racket.  I would also like to know who the most famous player is.  Also, what the first tennis outfits looked like.