1)
Why does the verse tell the ends of the land to turn to Hashem?
1.
Rashi: Abandon your idols, and via this, "you will be saved." Malbim - the idols cannot save the body, and not the Nefesh.
2.
Radak: All the nations should turn to Hashem the way Yisrael do 1 , and they will be saved like Yisrael are saved.
3.
Malbim: Do not think that only Yisrael can turn to me, for I gave to them Torah and Mitzvos!
1
Presumably, this means praying to Him. (PF)
2)
Why does it say "Ani Kel v'Ein Od"?
1.
Malbim: Only I have ability to save.