1)
What is the first half of the Pasuk coming to teach us (See Torah Temimah, note 89)?
1.
Sifra: It teaches us that if the Kohen Shechts an Olah she'Lo li'Shemo, it is Kasher.
2)
Why does the Torah write "Vehe'elah ha'Kohen es ha'Olah" in the past tense)?
1.
Pesachim, 59b: To teach us that if the Kohen brought the Olah before the Chatas, it is Kasher. 1
1
See Torah Temimah, note 90.
3)
What are the ramifications of "ve'Taher"?
1.
Ramban: Refer to 14:19:1:1.
2.
Seforno: The Mitaher is now permitted to eat Kodshim and to enter the Beis ha'Mikdash.