If the shop is as you have mentioned, (Part No. 9; Page No. 323) you should
pay Zakah on the articles prepared for sale with the price when the full lunar year passes according to the whole bulk account plus the cash you have. The debt that you owe your father does not prevent you from paying Zakah according to the most preponderant view of the scholars.
There is no Zakah on the land you mentioned as long as you have not decided to sell it.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.