ConsequentAtheist asks:
"Two points:
1. What originals, specifically?
2. Was Timothy inspired, and how do you know?"
1. The Textus Receptus (TR), Which the KJV is based is a collection of late manuscripts written after the 10th century that has several mistakes compaired with older manuscripts found after 1611 when the KJV was originally published. The originals that I spoke of were the originals written by the inspired apostle John in the first century around AD 90. Since we don't have this today, we have to go back to the oldest manuscripts, which are copies of John's letter. These predate the TR by hundredes of years to the second and third centuries.
2. I'm not sure I understand your question about Timothy. He did not write any of the books of the Bible and is probably not inspired. However, 1 Timothy and 2 Timothy were written by the apostle Paul and he was inspired. 2 Peter 3:15,16 refer to Paul's writings as scriptures.