What is the meaning of "ba'Rishon"?
In the first month. (Presumably, all the Meforshim who did not comment hold like this. ? PF)
Malbim: On the first day of Chanukas ha'Bayis, which will begin on Nisan 14.
What do we learn from "ha'Pasach"?
Radak: This refers to Shechitah of Korban Pesach.
Malbim: Do not think that the Korbanos mentioned here will be in place of Korban Pesach and [other Korbanos] of Chag ha'Matzos. Rather, they are in addition to them.
What are "Shevu'os Yamim"?
Rashi, Targum Yonasan: (It is seven days.) It is called so because then we begin to count seven weeks. Radak ? Shavu'os with a Cholem under the Veis is like Shiv'as with a Patach, like I wrote that "l'Umos Achad ha'Chalakim" (7) is like l'Umas with a Patach.
What is the meaning of "Matzos Ye'achel"?
Rashi: Matzos will be eaten during the festival. Malbim ? this teaches that no Mitzvos of the day will change [due to Chanukas ha'Bayis].