What are the implications of "Kadosh Yih'yeh lach"
Rashi: Act towards him with Kedushah
Why does the Pasuk repeat the Inyan of Kedushah so many times in the current Parshah (See Pasuk 6, 7, 8 & 15)?
Rashi (in Kedoshim): Because Kedushah denotes abstaining from Arayos 1 - and wherever there is a Geder Ervah, there is Kedushah.
To whom is Hashm saying "Ki Ani Hashem Mekadishchem"?
Ramban #1: He is saying it to the Kohanim. 1
Ramban #2: He is saying that through the Kohanim, who bring "the bread of Hashem," He is Mekadesh everybody, both the Kohanim and the rest of the people, when He then rests His Shechinah among them.
Ramban: As the Parshah begins "Emor el ha'Kohanim".