1)
What exactly, does the Pasuk mean by "Pesach Ohel Mo'ed"?
2)
Having instructed Moshe in Pasuk 4 to bring Aharon and his ssons to the 'entrance of the Ohel Mo'ed', why does the Torah need to insert here "Pesach Ohel Mo'ed"?
1.
Yoma, 5b: To teach us, via a Gezeirah "Pesach" "Pesach" from the Asiyah in Tzav, Vayikra, 8:2 that even what is not here written here, but what is written there (inserting the Urim ve'Tumim into the Choshen - Rashi) is crucial to the inauguration. 1
1
See Torah Temimah, note 22.