Conditions & Fundamentals of Hajj and Umrah

Q: I live in Mumbai (India) and I am planning to perform Umrah. I will be taking a flight from Mumbai to Jeddah and continue onwards from Jeddah to Makkah via bus/car. I know that I need to be in the state of ihram while passing the Miqaat. I will wear Ihram at Mumbai airport so that all I have to do while passing the Miqaat (in the air) is make the Niyah.

My query is that I do not know when should I make the Niyah so that I am sure I have not missed the Miqaat boundary. I will be travelling in a flight which will not be notifying me when I pass over the Miqaat area. What is the way that I should follow? Should I make Niyah from Mumbai (India) airport OR should I make Niyaah 1 hour before reaching Jeddah? There can be a chance that I do not pass over any specific Miqaat point (rather pass through between 2 Miqaat points), what do I do in that case? ?

Q: If a person is performing tawaf around the Kabah and takes a break for salah, does he have to restart the entire round or can he continue the tawaf from the spot that he stopped?

Q: Is it permissible to perform nafil tawaaf on a wheelchair despite being able to walk? I know that it is impermissible to make tawaaf in a wheelchair for obligatory tawaafs, but I would like to know if the ruling is different for nafil tawaaf?

Q: What is Tawaafuz Ziyaarah and Tawaafaul Widaa? How will one compensate for not performing it?

Q: If a person is performing hajj this year, should he refrain from clipping nails and removing unwanted hair from the first of Zul-Hijjah as he will be making Qurbani or should he clip his nails and remove unwanted hair on the 8th, before putting on his ihraam?

Q: I pass the meeqat without wearing ihram, so in this case do I have to give one Dam. Is it possible to feed some poor perosn or can I fast instead of giving damm.

Q: Is wudhu required during Sa'ee?

Q: If a person breaks wudhu during tawaf what is the procedure. If I go to renew wudhu how do you rejoin and from which round?

Q: I have a problem of urine drops after urine and also upon waking up. Is it permissible to tie a tissue for example with an elastic band for istibra purposes then remove, and also to have a tissue tied under ihraam during sleeping to prevent ihram from being affected with the drops during sleep