He declared himself emperor, which is absolutism and against the ideas of the enlightenment.
Overthrow by Royalists.
No, except in the early days regarding Corsica.
In the 1801 Concordat he ended the Civil Constitution of the Clergy, returned to the Gregorian Calendar and restored Sunday as a festival.
During the revolution, (he was in his very early 20's then) he left France and went back home to Corsica (which was a French colony at the time) and joined Pasquale Paoli who was a freedom fighter...