I'm not using an external 3d app besides blender but in any 3d app there should be an option to check the poly/face count hidden somewhere, I would google for [Name of your program]+Check polygon count.
No, O2 can't be tricked, only if you reach a certain polygon treshold it will import the model.
You could split the model up into several models in your 3d program (thats how BIS created the aircraft carrier) and set the console in place by using the split-up parts, but I don't recommend that. As said, it will have a heavy effect on FPS.
You're best on if you completely dump the model and rework from scratch and add details like keys and outlines by textures and not by the model itself or use polygon-reduction techniques for your 3d app.