What is the ruling on money earned from working in cigarette sales, and is it permissible to pray in clothes and with a watch bought with it, and is it permissible to pay debts or receive money owed by a person from this money?

If you are a tenant of the shop, you must repent from selling the forbidden tobacco. As for the money earned, there is no harm in benefiting from it. But if you are the owner of the shop, you must repent and dispose of the profits from selling tobacco by determining the amount of forbidden money and acting with caution.