Witr Salaah

Q:

1. Is witr Salaah waajib or fard?

2. If I pray my fard for esha and missed my witr, then is it a sin?

Q: My question is about witr Salaah:

1. After performing Esha Sallah at 8.00pm, can I delay my Witr Salaah till 11.00 pm(my sleep time)?

2. Can I combine Tahajjad and witr at the above mentioned time?

3. What will be my last Salaah before I go to sleep, Tahajjad or witr?

Q: What is the correct way of performing witr Salaah?

Q: In witr Salaah, what Surahs should I recite in the 1st rakaat, 2nd rakaat and the 3rd rakaat?

Q:

1. Is there two tashahhud or attahiyat in witr after the second rakaat and third rakaat?

2. When is the dua-e-qunoot be recited in witr? And send me the dua-e-qunoot please because I don't know it.

3. When is the perfect time to perform witr Salaah? Is it at tahajjud time?

Q: I prayed witr salaah with three rakaats. Meaning, my witr is similar to magrib salaah but with a Surah and then duaa qunoot in the third rakaat. Is this the correct way of reading witr salaah?

Q: Are there two Witr namaaz's per day? ie. 1. Esha - 3 rakaats Witr Wajib 2. Tahajjud - 2 rakaat followed by 1 rakaat Witr? Should both be read every night or are they the same and only one should be read?

Q: Can we offer Tahajjud Salaah after we have offered our Witr Wajib or we should not offer our Witr Wajib before Tahajjud?

Q: Should one read Bismillah Hir Rahmanir Rahim before reciting Duaa-e-Qunoot in the Witr Salaah?

Q: In Deoband the Ulama say witr prayer in Kaaba is not valid and we need to repeat it as it remains due. Is this correct? Also, can one pray 1 or 3 or 5 rakats in witr?