Hey Banjo:
Here's a couple of links:
http://www.allaboutthejourney.org/bible-manuscripts.htm
http://www.carm.org/manuscript-evidence
http://iamnext.com/spirituality/NTrely.html
They all have similar lists, and cite some of the same folks, but each have different additional material.
A great source from the one of the greatest textual scholars (and mentor of Dr. Bart Ehrman) is this book:
Metzger, Bruce M. The Canon of the New Testament: Its Origin, Development, and Significance. Clarendon Press. Oxford. 1987.
Metzger is easy to read and the book is packed with small and interesting details. Highly recommended and quoted by many. He also wrote "The Text of the New Testament: Its Transmission, Corruption, and Restoration (Oxford University Press, New York: 1992).
For your second question, I personally don't think the earth is 6000 yrs old, but I'm not so sure that the 4 Billion mark is accurate either. IMHO the dating method gets a bit circular the further you go back. For me, what is important is how it got here. I believe the premises of the Kalam Cosmological argument are valid and have not been refuted:
A. Whatever begins to exist has a cause.
B. The universe began to exist.
C. Therefore, the unverse has a cause.
Now for argument's sake it may not have been the God of the Bible, but again I haven't heard of a good scientific explanation of how the first thing got here to go BANG. The Steady State Theory was given up by the guy who proposed it, and the Cosmic Rebound Theory, Imaginary Time, and Heisenberg's Uncertainty Principle lack evidence and have plenty of science against them.
And since we're getting philosophical, if there is no God, then why is there something rather than nothing? And which worldview answers that question best?