The bit over the left shoulder and as edging over a pocket is the center/spine of an crocodile/alligator tail.
About a half dozen sharks teeth as various adornments on the coat.
The pistol is the Denix George Washington colonial flintlock.
The dagger is the Windlass Crecy War Dagger.
The boots are Civil War cavalry boots with the leather straps/rings added on.
The round belt buckle is the back of a coin. One which has the text “Vtraque Vnum” around the design. But it looks like just the design, no date/text, in the center, then an offset ring around that (either with no date/text or it very worn), and almost a wax seal effect around the edge.
Pretty similar bits to the ones on the right shoulder piece can be found on Etsy or at bead shops, though I’m not sure of any of the names of those.
He has a wrap over his left glove that has some diamond shaped stud insets in it, and it snaps at the back of the wrist and on the palm.
And the pants are a leather version of fall front breeches with some additional leg seaming and metal studs on the outside seams.
Hope that helps!