Rukoo and Qaumah

Q:

1. Should a muqtadee say the takbeers when moving with the imam or straight after the imam, if he did so after the imam would the salaah be valid?

2. Should the muqtadee say the tasmee and tahmid or only the tahmid? If he did both would the salaah be valid?

Q: What is the ruling on adding the word وبحمده to the tasbeeh of ruku' and sujood? Example: سبحان ربي العظيم وبحمده

I have seen some hadiths mention it, but not sure what the Hanafi madhab says regarding it.

Q: In the Jalsa or Ruku in prayer, we have to stop for at least one Subhanallah, but do we have to sit in Jalsa completely motionless, or is it okay if we sit for at least one Subhanallah but in that time our arm moved a little or our leg(s) moved a little? The same question is for Ruku too, do we have to be completely motionless, or is it okay that we be in Ruku for at least one Subhanallah but during that time we move a little? 

Q: Can we read these duas in fardh salaah:

Dua between the 2 sajdahs and حمدا کثیرا طیبا مبارکا فیه after raising from ruku? Or are they to be read in sunnah and nafil salah only

Q: Where should one focus his eyes while in rukoo? Should it be at the place of sajdah or between his feet?

Q: 

1. I am a student of deen. I wish to know whether the imaam and muqtadee should recite tahmeed in salaah? If they should recite it, then when should they recite it? Should they recite it while rising from ruku or while standing in qaumah? I have heard that there is a difference of opinion in the Hanafi Mazhab in regard to this mas’alah.

2. Should the munfarid recite tasmee and tahmeed or only tahmeed?

Q: I was always of the impression that the muqtadee should recite tahmeed in qaumah after the imaam completes reciting tasmee. However, I was lately informed by certain Ulama that the muqtadee should recite tahmeed at the same time that the imaam recites tasmee. I would like to know whether this is correct? I also wish to know whether all my past salaah are valid since I have always been reciting tahmeed in qaumah after the imaam completed reciting tasmee.

Q: While praying fajr salaah, I got up from ruku, but I was not totally straight. Is my salah valid?

Q: My question is regarding the dua said in sujud and ruku.

In ruku if one says Subhan a Rabbiyal Azeem 5 or 7 times and then Subhanak Allahumma Rabbana wa Bihamdika Allahumma ighfirli and in sujud Subhan a Rabbiyal A'laa 5 or 7 times, then Subhanak Allahumma Rabbana wa Bihamdika Allahumma ighfirli and then Astaghfurillah al-Adheemal-ladhi la illaha illa Huwal-Hayyul-Qayyum wa atubu ilay a few number of times (unspecific number) and the proofs for the following being:

A person who says:

“Astaghfirullah al-’Azeem al-lazi la ilaha illa Huwal-Hayyul-Qayyum wa atubu ilaih ” [I seek the forgiveness of Allah the Mighty, Whom there is none worthy of worship except Him, The Living, The Eternal, and I repent unto Him] … even if he has committed sins as much as the the foam of an ocean, still he will be forgiven. [Abu Dawud- 2:85/ Tirmidhi 5:569]

and Interpreted Translation Narrated `Aisha: The Prophet (ﷺ) used to say frequently in his bowing and prostrations "Subhanaka l-lahumma Rabbana wa bihamdika, Allahumma ghfir li" (Exalted [from unbecoming attributes] Are you O Allah

And for a longer sujud adding the following duas: Allahumma a Inni Ala zikrika wa shukrika wa husni ibadatika and the asking Allahumma Ajirni Min A Naar 3 times and Allahumma adkhilni Jannatul Firdous 3 times.

Proof for the following being: “The nearest a slave can be to his Lord (Allāh) is while they are prostrating, so increase in supplication” (Ṣaḥīḥ Muslim, Musnad Aḥmad) .

It was narrated that Anas (may Allah be pleased with him) said: The Prophet (peace and blessings of Allah be upon him) said: “Whoever asks Allah for Paradise three times, Paradise will say, ‘O Allah, admit him to Paradise.’ Whoever seeks protection from the Fire three times, Hell will say, ‘O Allah, protect him from the Fire.’” Narrated by al-Tirmidhi, 2572; Ibn Majah, 4340

Note: This is just a pattern of supplication which the person has memorized as it is easy for him to remember these in respective sujud and ruku. The person does not consider this to be as an action of Rasulullah (Sallallahu Alaihi Wassalam) but just some duas from the Sunnah that he can easily remember and supplicate from. Is this Bidah or is this allowed?