1)
What is the meaning of "va'Yiga"?
1.
Rashi: This is like Higi'a (arrived). Malbim - the Kal (light) conjugation is used, to teach that once the month came, they gathered. They prepared (started coming) earlier, to be there for Rosh Hashanah and the following Mo'adim.
2)
What is the seventh month?
1.
Rashi: It is Tishrei.
3)
How was it like one man?
1.
Ibn Ezra: They gathered quickly, like one man.
