Why soes the Tofrah add the word "Vehayah"?
Rashi: To inform the captor that. ultimately, he will hate her and want to get rid of her.
What are the implications of "Ve'Shilachtah le'Nafshah"?
Ramban #1 (citing the Sifri): "He sends her away" - but not to her father's house - either because she is now a Jewess or in order not to worship idols. 1
Targum Yonasan: It implies that if he wants to send her away, he is obligated to give her a Get. 4
What is the meaning of "Lo Tis'amer bah"?
Rashi and Ramban #2: It means that he is not allowed to use her as a slave. 1
Ramban #1 (citing Targum Onkelos, the Sifri and Sanhedrin, 85b), Rashbam and Targum Yonasan: It means that he is not allowed to use her as barter. 2
See Ramban DH 've'Rashi Kasav', citing the Yerushalmi in Shabbas and Avodah Zarah.
Rashbam: As we find later in 24:7 (This is simply san extension of Lo Simkerenah ba'Kasef").
See Ramban, DH 've'Shimush'.
What are the implications of "Tachas asher Inisah"?
Ramban (citing the Sifri): Even after the first Bi'ah, he is no longer permitted to sell her or to treat her like a slave.
Rashbam: It means after he has acquired her through Bi'ah.