Zakaat on property

Q: I adopted Islam three years back and have married a Muslim man. I want to know issues related to zakaat. I own a house and land which I purchased when I was a Hindu and was married to a Hindu man but after his death I married a Muslim man and adopted Islam. Is zakaat waajib on this property?

I am also looking after financially my husband's first wife and his children who live in a separate house. Almost half of my salary is spent on them every month as my husband is not financially sound. I want to know that is zakaat waajib on my monthly income?

Durood Shareef after Salaah

Q: After fard prayer, do you have to send salutation on Muhammad (Sallallahu Alayhi Wasallam) by reading the durood shareef? Every masjid do that but when I am doing research, in no place it is mentioned that after fard prayer, you have to send blessings on Muhammad (Sallallahu Alayhi Wasallam) (i.e Allahumma swaliraswayyidinamuhammadinwwaralaalimuhammadinwwabaarikwasallim)? Or is it that they do this because they make the congregational dua after that because durood should be recited before making dua? According to my knowledge, after fard prayer, you have to read ayat ul kursi, tasbeen e fatihi and make your own dua and some but this recitation of durood is confusing.

Doubts

Q: Yesterday my husband sat on a bench at the airport which had crumbs on it. I am not sure what the source of the crumbs are and I am now concerned that everywhere he sat thereafter like the car as well as the bags which came into contact with the parts of his clothes that touched the bench have now become napaak. I did check his clothes for traces of crumbs but it was hard to determine what was crumbs or just fluff and dirt and also what was the source of it as he was wearing the clothes the entire day and could have gotten the crumbs and dirt from various sources. Please let me know if I am required to wash everything that his clothes came into contact with thrice to make it paak?

Performing the Sunnats of Jumu'ah after zawaal

Q: I stay in Cape Town and most of the musjids are of the Shafi'ee Mazhab. For the Jumuah Salaah, they only perform two rakaats sunnah before the second Azaan and khutbah commences. Since I am of the Hanafi mazhab, I am required to perform four rakaats. Therefore I am not given enough time to complete it and generally I am in the third or fourth rakaat of my Sunnah Salaah when the Azaan or khutbah starts. Kindly advise me of the correct procedures to be followed if what I am currently doing is not acceptable.