1)
What were the "Olos la'Ba'al"?
1.
Malbim: In addition to offering to Molech, they sacrificed [to idolatry].
2)
Why does it say "Lo Tzivisi"?
1.
Refer to 7:31:2:1-3 and the note there.
3)
Why does it say three expressions - "Lo Tzivisi v'Lo Dibarti v'Lo Alsah Al Libi"?
1.
Refer to 7:31:3:1.