Salaah

Q: Can we read tahajjud before heading to bed (time might be 11pm or 12 pm)?

Q: A person goes to visit someone else and they read salaah in their house. Later on they discover that the qibla they faced in salaah was incorrect and was in the opposite direction. Do they have to repeat all the salaah they performed at the house (including in the past)?

Q: If I smoke cigarettes, will 40 days salat not be accepted. Is it true? I mean, does smoking cigarettes have any effect on my salaah?

Q: I would like to know if I get the Imam in Ruku in Jamat, should I read Surah Fatiha first after takbir then go to Ruku or should I go to Ruku directly?

Q: Is it permissible to have a wallet in one’s pocket while praying salat? The reason I ask this question is because there’s a chance that dollar bills in the wallet may have traces of fecal matter on them as they are used inappropriately in strip clubs.

Q: What rakats will I pray as a qadha if my fajar namaz was qadha. Will I offer the sunah as well? If so, is it sinful to not pray the sunnah rakat while offering qadha of fajr. What will be the best time to offer fajr qadha?

Q: What should one say when replying to "Assalaatu khairun minan naum" in the fajr azaan?

Q: If Surah Ikhlaas is mistakenly recited in the first Rakaat, what is the best Surah to then recite in the second Rakaat?

Q: I was in the car and going towards the mosque and it was me and the driver in the car. We were getting late for prayer in the mosque and got stuck in a alley in the car. To the best of memory I got out and asked the driver that just park towards the side of this alley and come as namaz is getting late. He said no no the car will get scratched. I made it to the mosque Alhumdullilah and got 1 rakah of prayer and prayed that he also makes it. Afterwards I found out that he missed the prayer and prayed alone in the mosque. Have I done someting bad or a sin?

Q:

1. Is the Witr prayer compulsory?

2. Is it true that without Witr prayer Isha prayer is not complete?