A. Why can you not remove alcohol from the shop immediately? Once the shop becomes yours, you have the right to do so. Even having separate tills will not make it permissible to sell alcohol. The Hadeeth prohibits dealing in alcohol on every level. (Ibni Maajah V2 P1121).
You will have to remove the alcohol from the shop immediately. Keeping alcohol in the shop even if you are keeping it separate will diminish the Barkat and you will all along be under the curse of Allah Ta'aala and His Rasool (Sallallaahu Alayhi wa Sallam). So you should remove the alcohol before you begin trading