Tickets to the actual dedication of the Paris France Temple are normally only available from priesthood leaders in stakes served by the temple district. If you know a member within the temple district there, you might be able to arrange with their bishop for tickets to attend the dedication broadcast at one of the stake centers in the country. It would require that you show the bishop valid temple recommends for him to be able to give you tickets to attend.
The open house, as russellhltn said, is available for anyone to attend, member or not. You will be able to get free tickets at the website he provided once ticket distribution begins.