The model is created in an aim to hold as much of details in its geometry as possible, not for using it directly in videogames, it is considered to be high poly. Some parts have a simple base geometry and a subsurf modifier generates the final poly count. There are modelers and digital artist who consider such models low poly subsurf model. On the other hand many parts have high number of vertices without the subsurf. The total number of vertices without subsurf modifiers is aound 700k.

Yes. The model is sold under Royalty Free licence, that means buyers are authorized to use the model, textures materials for their commercial products without restrictions.

No. The model is aimed mainly to be used digital products and not otimized for printing technologies. Many printing devices exist with varrying requirements regarding the geometry, in order to make the model printable, the models of the parts need to be reworked to fit the actual 3d printer.