Business and Dealings

Earning from an item one purchased with haraam money

Q: I used to make money by promoting un-Islamic cartoons. I used that money to buy a laptop. From that laptop I learned and make applications/ programs. Now I get a lot of money from the apps I made. My income now is halaal insha-Allah, but the problem is, my laptop was bought with haraam money.

What is the status of my income now? What about the knowledge I got when using the laptop? Is the money I generated, and the apps I made, all haraam? How do I repent and cleanse my profit/income?

Selling Islamic items

Q: I would like to start a business. Since I'm very passionate about Islam, I want to start a business with an Islamic theme to an Islamic target (I am thinking of selling Islamic books or Islamic wall arts).

My question is, is it haraam to earn money from this type of business?

P.s. It is not that I want to profit from the fact that I am Muslim, rather I feel a big passion for Islam and if there is something that I would like to spend most of my time with, then it is Islam.

Purchasing a property on an interest bearing loan

Q: My father bought an agricultural land almost 19 years ago, measuring 110 acres. My father is an advocate by profession and at the time of purchasing the land, my father had some money earned by himself and took some money in the shape of a loan from the bank and bought the land. I have heard that taking a loan is completely haraam, so is the land haraam for us? How do we make it halaal?