1)
How will Hashem make it la'Vaz for strangers?
1.
Malbim: He will bring them to Yisrael's land, and Yavozu (they will plunder) the silver.
2)
Why does it say "ul'Rish'ei ha'Aretz l'Shalal"?
1.
Malbim: Shalal is what remains after the owner falls in war. Baz is what the enemy takes forcibly. The Shalal that remains, that strangers will not plunder it, Resha'im of the land will take it.
3)
It is written v'Chileluha (feminine), and we pronounce it v'Chileluhu (masculine)!
1.
Radak: The Kesiv refers to the Shechinah; the pronunciation refers to the Bayis.