Salaah

Q:

1. Someone prays all Salaahs on time except the Fajr prayer which he misses for many reasons. One is that he watches TV, etc. Will Allah (SWT) accept from him the four prayers if he doesn't pray Salat Al-Fajr? 
2. I have sleep problem, I don't fall asleep easily.  I try using alarm to wake me up for fajr salah but it doesn't works.  If I wake up for fajr I can't fall asleep again so can I pray fajr as qaza during zuhr time, praying as qaza would fajr be valid?

Q: My question is about "taqlid after amaal".

If a Hanafi after salaah, finds out his salaah was not valid according to the Hanafi madhab, but it is valid according to for example Hanbali madhab, can he follow that madhab and suffice with salaah he has prayed?

Q: In the Hanafi madhab, if you remain silent (during prayer) for a time period where one can recite "Subhan Allah" 3 times, then it becomes waajib for the person to perform Sajdah Sahw. If, however, the individual did not perform Sajdah Sahw, does he then have to repeat his prayer? What if, in the past, the person did not pay attention to this fact during his prayer, and he now has several prayers where he was required to perform Sajdah Sahw, but he did not do so. Does he have to repeat all those prayers?

Q: When the Azaan is going on, can one continue reading the Quran, is this considered sinful?

Q: After fajr and asar Salah, the Imaam saheb sits facing the muqtadi. Why?

Q: I have heard recently that some Fuqahaa have permitted  a certain amount of degrees leeway on either side when facing the qibla. Could you please elaborate on this?

Q: What is the time difference between rakatul fajr and salaatus subhi? Should the sunnah be considered as optional?

Q: What is the method of making salam behind the Imaam in jamaat?

Q: What is amal-e-katheer?

Q: If person A prays a fard prayer and Person B prays nafl prayer behind him, will Person A obtain the reward for praying in congregation (25/27 times the reward of praying alone), even though the person he is leading is only praying nafl?