Witr and Nawaafil

Q: I want to know the time of Tahajjud prayer. Fajar prayer time is 4:30 am and I usually used to offer Tahajjud at 3:30 am but I am confused if it's the right time or not.

Q: In the witr prayer, if a person has a doubt as to whether they are performing the first rakat or the second rakat and this doubt occurs quite often and because their heart is not inclined towards either rakat that person chooses the lesser number and performs the first rakat along with the tashahhud because it is possible that this could be the second rakat. In the second rakat does this person have to recite the qunoot because it is possible that this could be the third rakat? In the third rakat, does this person have to recite the qunoot again along with prostration of forgetfulness.

Q:

1. In the witr prayer, is it makrooh tahreemi, makrooh tanzeehi, or permissible to recite a surah in the third rakat which is longer by three verses or more than the surah which was recited in the first rakat and is it makrooh tahreemi, makrooh tanzeehi, or permissible to recite a surah in the third rakat which is longer by three verses or more than the surah which was recited in the second rakat?

2. In a fard prayer or in a wajib prayer, if two surahs have the same number of verses but not the same number of words then would it be makrooh tahreemi, makrooh tanzeehi, or permissible to recite the surah which has less words in the first rakat and to recite the surah which has more words in the second rakat?

Q: If someone offers only the fardh salaah and leaves out performing the sunnah salaah, then what is the Islamic ruling? Is it a sin to leave out the sunnah salaah and only offer the fardh?

Q: Is chaasht a sunnah salaah that Rasulullah (Sallallahu Alaihi Wasallam) performed and is there any Ahaadith regarding it?

Q: If a person commences performing four rakaats sunnat ghair muakkadah, before Asr or Esha, but due to the jamaat salaah starting, he only performs two rakaats instead of four, then will he need to perform these four rakaats later on after the jamaat? (The reason I am asking is that I have read that once we start salaah, even a nafl salaah, it becomes waajib to complete it.)

Q: For the four rakaats sunnah before isha, do we pray in pairs or four rakaats with one salam and for the four rakaats after esha is that in pairs or four rakaats with one salam and what intention do we make for these four rakaats?

Q:

1. Regarding any nafl salaah, I would like to know if it is permissible to read the qiraat aloud, for purposes of dhor?

2. If it is, should one perform the salaah as though leading a jamaat, i.e. say takbeer for postures aloud, etc.

3. Do the same rules above apply for qadha salaah as well?

4. What are the rules for performing nafl salaah in jamaat, e.g. with one's spouse or household?

Q: I want to read isthikaara for a marriage proposal. How many days should it be read for?

Q: I had offered 2 rakaahs of sunnah after zuhr, but I forgot that I already offered it. So I offered it again, but I mistakenly faced the wrong direction instead of the Qiblah. Should I offer the sunnah again?