The writings collected into the Torah all predated Paul, originally known as Saul, by hundreds of years. Saul is not featured in any of the Torah written literature.
As the son of a very observant family, Saul was steeped in knowledge of the Torah and the traditions of the Jewish oral codes of conduct. As he introduced himself before the tribune and court in Jerusalem,
I am a Jew, born at Tarsus in Cilicia, but brought up in this city at the feet of Gamaliel, educated according to the strict manner of the law of our fathers, being zealous for God as you all are this day.
As a devout leader of the Jewish faith, Saul was actively involved in working to crush those attempting to change the traditions and beliefs by proclaiming Jesus as being the long-awaited Messiah. He participated in and witnessed arrests and stonings of Christians. Saul was on his way to Damascus with authorization from the officials of the Jewish leadership to bring Christians being held there to Jerusalem for prosecution when Jesus appeared to him in a vision.
As I made my journey and drew near to Damascus, about noon a great light from heaven suddenly shone about me. And I fell to the ground and heard a voice saying to me, 'Saul, Saul, why do you persecute me?' And I answered, 'Who are you, Lord?' And he said to me, 'I am Jesus of Nazareth whom you are persecuting.'
Saul was blinded, led to shelter in Damascus, restored to the seeing by Ananias, and went on to become the great evangelist to the Gentiles using his other name, Paul. His background knowledge of the Jewish tradition became important as he helped the new church and the foreigners discern ways to combine their divergent backgrounds into the new Christian faith.