Should I purchase tour tickets for Paris before arrival?

I’m going to Paris for the first time, and I’ve been creating an itinerary online of various tours and destinations which I can purchase now. Is this the best way to go, or is it better to wait until you get to the hotel and arrange for tours there? I’m looking at Illuminations, Moulin Rouge, the Seine Cruise, a day bus tour of the city and a short tour of Versailles

Paris bus tour on the way to Israel?

will travel to Israel this summer (end of august) if will fly with air france I will get a several hours stop over in paris. never been to paris and was wondering if it is worth the trouble getting a visa to have a quick bus tour of the city. anyone have better ideas?

What is the best way to tour around Paris?

Suberban trains?Boats?OPen bus tour? How much it will cost and from where it will start?