What is the meaning of "Mafreses Parsah?
Rashi, Targum Onkelos and Targum Yonasan: It means that its sole (hoof) is split into two.
Rashbam: It means that its hoof consists of one nail. 1
And is not divided into nailed claws like the sole of a hare and a rabbit (Rashbam).
What is the meaning of "Shosa'as Shesa?
Rashi, Targum Onkelos and Targum Yonasan: It means that it is completely split from top to bottom. 1
Rashbam: Its hoof is divided into two. 2
Why does the Torah add the word "ba'Beheimah"?
Rashi: To teach us that a fetus that one finds inside a Shechted animal is permitted.
What is the meaning of "Ma'alas Geirah"?
Rashi: It means that the animal sicks up its food (cud) from the stomach into its mouth. 1
And why does it add the words "osah Tocheilu"?
Rashi and Ramban #1 (citing the Toras Kohanim): It comes to add an Asei to the Lo Sa'aseh against eating animals that do not possess the two above-mentioned Simanim.
Ramban #2 (citing Rambam): It comes to prohibit human flesh. 1
"Osah Tocheilu", 've'Lo Adam' (See Ramban, who disagrees with the Rambam and who elaborates at length on the issue).