We as in the inhabitants of this planet. But mostly the Rabbis in Israel hold the largest collection - except perhaps the Vatican.
Many are made available for access via the internet while many still haven't been either studied or are hidden away in vaults. Nehemiah Gordon gave an excellent presentation at the link I provided about what he has uncovered so far. He also describes these texts and how many have yet to be studied. If anyone is interested, I'll go look for the links to the more pertinent parts and repost them.
Who's got the manuscripts and where are they and why aren't they being released for public knowledge?
Again, some are available, many are not. Many exist as bits and pieces awaiting study by scholars. Some are locked away for now. I trust the Almighty has his ways of having the full truth emerge when the time is right. Maybe he is waiting for his people to show some interest in actually knowing the truth - I see that happening too with the Hebrew Roots movement growing like it is.
If one followed the ten comandments to the letter would he not be following all the written Torah?
Oh yeah? From Why the New Testament was written in Greek, not Hebrew :
Scholars have long denied the veracity of the New Testament Scriptures, claiming that the earliest gospels were not eye-witness accounts of Christ and His life, but were written some one hundred years afterward, or about the middle of the second century, and were based on hearsay, myth, fable, and oral stories which had been passed down. Thus many scholars have regarded the very words of Christ, as recorded in the gospels, as "suspect."
Astonishing as it may seem, however, bits of papyrus in an Oxford University library puts the lie to the cherished theories of unbelieving, skeptical scholars! Three scraps of text of the gospel of Matthew, inscribed in Greek, have traditionally been believed to have been written in the late second century. But German papyrus expert Carsten Thiede has published a paper arguing that these fragments kept at Oxford's Magdalen College very likely represent an actual EYE WITNESS ACCOUNT of the life of Jesus!
The London Times reported that the evidence on an early form of writing paper was a potentially "important breakthrough in biblical scholarship, on a level with the discovery of the Dead Sea Scrolls in 1947" (Los Angeles Times, Dec.25, 1994, "Gospel Fragments in Britain May Be Contemporary Account of Life of Jesus Christ, p.A42).
Some scholars have questioned the accuracy of the New Testament as historical, believing that the earliest texts were written long after the actual events described. However, careful new analysis by Professor Thiede has dated the fragments to the middle of the first century, thereby indicating that they are evidence that the Matthew Gospel was written only a generation after the crucifixion, or even earlier! Says William Tuohy of the Los Angeles Times, "Parts of the New Testament may have been written by men who actually knew Christ, rather than authors recounting a 2nd-Century version of an oral tradition."
The Magdalen fragments have been at the Oxford college since 1901. Little work has been done on them since 1953 when they were last edited by biblical scholars. But earlier this year, Thiede visited Oxford and inspected the papyrus. He concluded,
The lines on the fragments are from Matthew 26 and include the oldest written reference to Mary Magdalene and the betrayal of Christ by Judas. This fragment, written soon after the death of Christ, in the first century, is written in the Greek language, putting in the trash compacter once and for all the notion that the apostles did not speak or write Greek!
This new discovery by Professor Carsten Thiede, a papyrus expert, will provoke controversy among scholars, if not even dismay and consternation on the part of disbelievers and skeptics. His discovery is strong evidence that the gospel accounts regarding the life of Jesus Christ are accurate, and reliable historical documents.
The Magdalene fragment from the Gospel of Matthew has been identified as coming from a document dated to the middle of the first century A.D. -- during the very lives of the apostles! This fragment is written in GREEK, and could even be a fragment from an original monograph written by the apostle Matthew himself! This amazing new discovery is powerful evidence, obviously, that the writer, evidently the apostle Matthew, was very familiar with the Greek language and was capable of writing intelligently in it.