Short answers, pulled from the story.
Louis Stanislas Xavier entered the world on the 17th of November 1755 inside the Palace of Versailles. He received no name until six months after his birth when priests baptized him.
Allied troops entered Paris on the 31st of March 1814 ending Napoleonic rule temporarily. Napoleon abdicated on the 11th of April allowing Louis to resume the throne five days later before arriving in Paris on the 3rd of May.
Napoleon escaped Elba on the 26th of February 1815 bringing approximately one thousand troops near Cannes by the 1st of March. Louis fled midnight on the 19th of March traveling first to Lille then crossing into the United Kingdom of the Netherlands halting at Ghent.
Health declined rapidly for Louis XVIII beginning spring 1824 as obesity gout and gangrene affected legs and spine causing severe pain. He died on the 16th of September 1824 surrounded by family and government officials.
Succession passed directly to Charles X youngest brother Count of Artois. Louis was interred at Basilica of St Denis serving as necropolis for French kings.