Zikr & Dua

Q: Can I read Aayate Kareema (Prophet Yunus alaihis salaam's dua) everyday 1000 times? 

Can I count it as Istighfaar or Tauba or both? If yes then do I need to do the istighfaar separately or the above 1000 times Aayate Kareema daily is istighfaar as well. 

Does reading Aayate Kareema need ijaazat/permission from any Shaikh, Aalim or Mufti?

Q: Is it permissible to write (SAW) after writing the name Nabi Muhammad?

Q: Is it preferable to make dua in sajdah during salaah or after Durood Ebrahim or after salaah in sajdah or while lifting your hands and making dua after salaah?

Q: If alot of people are sending durood to Nabi (sallallahu alaihi wasallam) at once, how does Nabi (sallallahu alaihi wasallam) reply to all?

Q: There is a specific durood from the elders that I have found repeatedly. Yaa rabi salli wa sallim daa e man a ba dan a laa habeebika khairil khalqi kuli hi me 

Another adds the additional line of wa barik wa salim tas leeman ka theeran ka theeraa. 

It seems as is there is an emphasis of great virtue of this specific durood. Are there any virtues or specific benefits or importance of this durood?

Q: Can a Muslim make dua for a non-Muslim?

Q: At the end of a Madrasah academic year/grade, a gathering (often called a jalsah) is held with nasheeds, bayaans and awards for students. Is there anything in Islam where it states that a dua should be made at this gathering/jalsah?

Q: To recite Aayat e Karima 125000 times, is it necessary to read daily or can we read 2-3 times a week due to busy schedule?