What are the implications of the double Lashon "Imcha Yeishev" and "Bekirb'cha"?
Targum Yonasan: "Bekirb'cha" implies that the Eved must be allowed to live 'among you' ("ba'Makom asher Yivchar" - wherever he finds suitable Parnasah - Sifri) and to keep the Mitzvos like you.
Sifri: "Imcha" implies in a town together with you - and not on his own; "be'Kirb'cha", 've'Lo be'Sapar' - not in a border town. 1
Targum Yonasan: Teach him Torah and fix for him Midrash (See Na'ar Yonasan).which - in order not to act as a fift colomn - to deliver the nerby town into the hands of the enemy (or to act as a spy - to supply them with information).
What are the implications of "be'Achad She'arecha"?
Sifri: "bi'She'arecha" precludes Yerushalayim - which was not distributed among the tribes; 1 "be'Achad She'arecha", that he remains in one town, and not travel from one place to another.
See Torah Temimah, note 82.
What are the connotations of "ba'Makom asher Yivchar"?
Sifri: 'In a town where he can find Parnasah'.
Why does the Torah add the (otherwise superfluous) words " be'Achad She'arecha ba'Tov lo "?
Sifri: Refer to 23:17:2:1. It implies that he is permitted to move from an inferior location to a better one. 1 2.
See Torah Temimah, note 83.
What is the meaning of "Lo Tonenu"?
Targum Yonasan and Sifri: It means 'Do not hurt him verbally'. 1
Refer to Vayikra, 25:14:3:1. See also Torah Temimah, note 85, who elaborates, and Oznayim la'Torah DH 'Lo Tonenu' #1.