New phone line ie wire from pole needed

But you will have two monthly bills. One from Free for the Internet service and one from Orange for line rental.
If you really only want it for Internet and you have good mobile reception, it might be better to go that way and not bother with the landline.

Orange own all the lines and rent them out to the other operators, if you want to use free, then contact them and they will sort it out with Orange, just that it will take longer than if you signed up with Orange.

France Telecom owners of Orange own the wires what you do after that is up to you.