Short answers, pulled from the story.
Napoleon crowned himself Napoléon I, Emperor of the French on the 2nd of December 1804. This inauguration marked the beginning of the First French Empire and consolidated his absolute authority over the nation.
Napoleon abdicated unconditionally on the 11th of April after attempting to place his son on the throne. The Allies allowed him to keep his title of Emperor but exiled him to Elba.
Charles Maurice de Talleyrand maneuvered to negotiate the capitulation of Marshal Marmont who defended the capital. On the 31st of March Talleyrand dined at his hotel with Frederick William III of Prussia and Alexander I of Russia.
On the 1st of April 1814 the Sénat conservateur elected Talleyrand chief of a five-member provisional government. On the 3rd of April the Senate voted on text detailing its reasons for ousting Napoleon.
He was defeated at the Battle of Waterloo and imprisoned on the remote rock of Saint Helena for life. This event followed his attempt to return to power on the 26th of February 1815 leading to the Hundred Days campaign.