Let me answer this as it is at the top of your post and everything else can be explained in like manner.
You wrote that what is to be read in the salat is the Quran and quoted:
[29:45]: “Recite, [O Muhammad], what has been revealed to you of the Book and establish prayer. Indeed, prayer prohibits immorality and wrongdoing, and the remembrance of Allah is greater. And Allah knows that which you do.”
Brother Dawood, you recall how I disagree over taking verses out of context and putting these together with other verses or part verses? Yes?
I agree with this verse that reading of the Quran is linked to salat. A soldier needs instructions from superior officers to go out and fight; going out and fighting cannot be done with the soldier repeating Vande Mataram and not knowing what to do or where to go. A full reading of the Quran is essential for someone to know what are the commands, principles etc that Allah wants us to live by. A Namaz ritual, repeating the same words does not do this.
Reciting in 29:45 is linked to avoiding the wrong results that has happened to past nations as well as reading what the Quran to others so that they will know the truthy. In the middle of this context we have salat which incorporates both these situations which namaz does not do in the slightest.
29:41 The likeness of those who choose patrons other than God, is that of the spider which makes for itself a house. The frailest of all houses is the spider’s house, if they reflect on what they know. [Its web easily traps the weak but cannot withstand the least bit of pressure]
29:42 God knows whatever they call upon instead of Him. He is Almighty, Wise.
29:43 Such are the examples We cite for mankind, but only men and women with knowledge of sciences will make best use of their intellect. [‘Aalim = Scientist = A knowledgeable person. 30:22-23, 35:27-28]
29:44 (It is those who can best understand that) God has created the heavens and the earth with a definite purpose. In this, is a sign for those who choose to believe.
29:45 (O Prophet) convey to people all that is revealed to you of the Book, and establish the Divine System. Establishment of the Divine System will shut off lewdness, stinginess, and bad conduct. This is so, because God’s law is the Greatest law that can give you eminence. And God knows whatever you people contrive on your own. [21:10, 21:24, 23:70, 43:43-44, 70:21-27. Fahasha includes miserliness, and Munkar is all behavior that goes against Permanent Values given in the Qur’an]
29:46 (The Divine System will be the Living truth in itself, so) argue not with the People of the Scripture except in a most kind manner. Tell those who adamantly relegate the truth, “We believe in what has been bestowed upon us, as well as (the truth in) what has been bestowed upon you. For, our God and your God is One, and to Him we surrender.”
[2:79, 2:101, 3:78, 5:48. Zulm = To relegate the truth = Displace something from its rightful place = Oppression = Violation of human rights = Wrongdoing]
29:47 And thus it is! We have bestowed this Book upon you (O Prophet). And many of those whom We gave the previous scriptures will come to believe in it (5:48). Also, many of your people will believe in it. And none could knowingly reject Our messages except such as would preemptively reject an obvious truth.