@StudentofHim,
I think you are seriously mistaken with your proposal that the Torah/Pentateuch is the foundation or standard by which all else is measured.
I think that foundation or standard is rather to be found in Yahweh Himself, specifically in the Word become flesh, God the Son.
The way Christ taught the Torah was shocking. He didn't seem to teach that the Torah was the foundation or the standard.
Instead, He showed up and claimed to be "The Standard". He comes on the scene and basically says "I AM THE I AM who gave the Torah to Moses".
He says that He didn't come to abolish the Law or the Prophets, but rather fulfill them. At the same time, He makes it clear that He Himself is going to define what fulfilling them means, thus showing Himself as the Standard rather than the Torah.
In the Sermon on the Mount, Christ said "You have heard it said...(quotes things from the Torah)... but I say to you...".
In Matthew 12:8 Christ stated that "the Son of Man is lord of the Sabbath". He's not just claiming to properly understand or teach the fourth Commandment, He is claiming to own it, and place Himself above it.
That's shocking, He just claimed the authority of Yahweh.
WHAT!?!?!
The Jewish leaders knew that was what He was saying. They refused to believe Him, and crucified Him for it.
A few days later, Christ conquered death, and rose from the.grave. He was thereby vindicated by God the Father as "THE STANDARD".
That is a big part of what makes the New Testament "New".
The Torah.and the Prophets promised, and pointed to the coming Savior. The Gospels tell of His coming, give us His teaching, and display His saving Work. The Epistles help explain what it all means and what the implications are.
All of it was breathed out by the Spirit of God, and is authoritative.