This museum must be quite an experience to visit, not only for the cars, but for everything else it has, as you point out that it has motorcycles and a lot of other things. To me of this type of museums, and private collections that I have seen in tv programs and youtube videos, what attracts my attention the most are posters, emblems and objects related to automobiles, they attract a lot of attention because although they are not as big as cars or motorcycles, they are very useful to decorate these areas dedicated to the automotive world.
RE: Automobile Museum in Villa Real [ENG-ESP] Museo del Automóvil en Villa Real