Left picture on the 2nd row. Pieces came from the clutch plate itself, the metal part of it. Next to one of the five springs. Is that normal?
Some set comes with the TOB and some sets don't. Just see the list parts included in the kit. Whatever your choice is make sure they properly torque everything including the TOB. Mine broke due to bad torque setting (from the previous owner's shop). It was just a little over a year after replacement when it broke.
I have seen and replaced many clutches (but not On Ferraris), that were broken even more than yours. Usually the broken metal parts fall into the pressure disc central spring and then do not let the clutch to fully disengage... Try Eurospares, geographically they are nearest to you and will have the clutch set in stock for sure
Worth noting that your clutch was absolutely knackered anyway, so in effect this incident was not a waste of money nor a good clutch. Ensure the flywheel is checked before a new clutch is fitted, and the TCU setup is OK once you have the car back i.e. no grabbing or excessive slipping of the clutch. P.S. Your release bearing was leaking. Replace it. Likely causing the clutch to drag.