Assuming you are using Windows

for Leonardo G2M you need to open the zip and copy the folders in the My Library folder into the content directory you wish to use - the Daz 3dStudioMy Library folder in your own Documents folder or the My Daz 3D Library folder in your public documents folder. When asked if you want to merge the folders say yes.

Similarly for the face magnets, the folders in Faces Fridge Magnets DAZ Studio need to go into your content directory and to be allowed to merge with the equivalent folders that are already there.

Once you have done that, and refreshed the folders in DS' Content Library pane (right-click menu) if it was open at the time, yoyu should be able to load the items from the Content Library pane>content folder you installed to, under props>Faces Fridge Magnets or (with Genesis 2 Male selected in the scene) under Presets>Characters>Dany66 for the leonardo character (which isn't, strictly, the right place but it will work).