2. Until you provide the list of referenced traditions, we won't know how many there were. Certainly, not everything Jesus said or did.
The Catechism of the Catholic Church references many such elements of Apostolic belief, observance and practice. You'll need to use their search function. Try keyword TRADITION.
Let me respectfully re-direct your attention to my analogy about the family's Thanksgiving Dinner traditions. A lot of it is not in what we "write." A lot of it is in what we "do."
You may need to spend more time in the 1st, 2nd, and 3rd century Christians ("Apostolic" or "Ante-Nicene" Fathers) to perceive what they did and we still do. Justin Martyr and the Didache are good places to begin. Plus Ignatius of Antioch (second bishop of Antioch, succeeded Peter) of course; and Polycarp, too, his friend, who was, with him, as disciple of St John.