I will say that for each character a day or two, this includes time fixing mistakes noticed after the model is done. This is meshes and textures only, the character wouldn't move at this point. Now I can't really say for the animation and that was some impressive fast paced animation, a rough guess would say about six to twelve hours per animation.
The levels is more about the amount of props in one than as a whole, but say five days for the assets used in the background of a single level.
Note this is only the visual elements, coding level design and other things excluded.