The OpenSCAD file contains one of each figure, Mary, Joseph, a shepherd, a king, an angel and the crib. To print a bigger set you can print separate figures multiple times. The source file is reasonably well commented but you'd best be familiar with OpenSCAD.

Otherwise just print the whole set multiple times and dump the spares.

I printed in clear PLA then painted the models with Tamiya model acrylic paint, the effect for the angel's wings when left in clear PLA is quite nice.