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"You better hope not because if they are,"

OK, I'm going to take that as a yes. Now here is the deal. Peter called Paul's writings "Scripture".

2 Peter 3:

"...just as our beloved brother Paul also wrote to you according to the wisdom given him, as he does in all his letters when he speaks in them of these matters. There are some things in them that are hard to understand, which the ignorant and unstable twist to their own destruction, as they do the other Scriptures."

Peter says Paul's letters just like the "other Scriptures".

That give us a secure basis for quoting Paul (in opposition to your statement "I shall point out that the letter itself was not in the Bible at the time Paul wrote it"). According to Peter, Paul's letters WERE in the body of Scripture. Period.

Now to prove that "All the 'Tradition' you need is contained in the Scriptures."

2 Tim 3

"But as for you, continue in what you have learned and have firmly believed, knowing from whom you learned it and how from childhood you have been acquainted with the scriptures, which are able to make you wise for salvation through faith in Christ Jesus.

All Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, that the man of God may be competent, equipped for every good work.

Right there Paul states to Timothy that "the scriptures, ... are able to make you wise for salvation through faith in Christ Jesus".

The Scriptures are able to bring you to salvation.

Additionally...

"that the man of God may be competent, equipped for every good work".

The Scriptures are able to reprove you, to correct you, and to train you in righteousness so that you can live a life pleasing to God and ready for all kinds of good works.

Scripture provides all that you need to be saved and to live a life pleasing to God. And that, my friend, is all a person truly needs.