What is the question "ha'Yirtzeh Hashem b'Alfei Eilim"?
Sha'arei Teshuvah 1:25: If I will give them for His many Chasadim ? will they be accepted?
What is the significance of rams?
Radak: They are the choicest meat to eat.
How could one give tens of thousands of rivers of oil to Hashem?
Rashi: They would be in Menachos. Radak ? this is an exaggeration, like "Naharei Nachalei Devash v'Chem'ah" (Iyov 20:17).
Malbim: They are for Nesachim 1 of the Olos.
Nesachim are wine, but the Minchah that accompanies a Korban is called Minchas Nesachim. (PF)
What is the meaning of "he'Eten Bechori Pish'i"?
Rashi: Should I offer my Bechor as a Korban for my sin? Radak ? perhaps Menachos and animals do not suffice, only my dearest son ? my Bechor. I will offer him to atone for my sin.
Sha'arei Teshuvah 1:25: I recognize that my sin is so great, that it would be proper to offer my Bechor for a Korban due to it.
Why does it add "Pri Vitni [Chatas Nafshi]"?
Radak: The matter is repeated in different words. Should I offer the fruit of my womb for the sin of my Nefesh?
Radak citing Targum Yonasan: The dearest of my womb, i.e. the most beloved of my children.
Sha'arei Teshuvah 1:25, Malbim: Chatas is less severe than Pesha (rebellion), therefore a lesser child suffices for it.