How can I count polygon and vertices in 3ds Max modelled software?

Go to Views menu ...
Viewport ....
Configuration Viewport Configuration dialog ....
Statistics tab.
can display statistis that show the number of vertices, polygons close the dialog and press7 .....
look at left up of viewport you find the statistics

Its very simple. Press7 from keyboard you will have the display of poly and vertices count on top left corner. 

If you are looking for the count of polygons and vertices for an object instead of the entire scene you should see that information in the Object Properties.