My figures are a mixture of Italieri, Airfix, Zvezda, Art Miniaturen, Hinton Hunt, Hat and various others. I have put a few in cloaks. The trumpeters ought to be in the post-1812 green livery, but these are in the old light blue.
The Carabiniers had perhaps the most theatrical uniform of the Napoleonic Wars. I imagine they would have worn grey campaign breeches but have kept them in white. Given that the campaign occurred at such short notice, perhaps this is not wholly unrealistic.