Mate I am fairly sure the music you are referring to is The Lord Of The Rings - The Two Towers - Requiem For A Dream. hope that helps, let me know if this is right. :-) try this link
Yes, and no. The Hobbit tells the story of the finding of the ring; the Lord of the Rings tells what happens after. You can read The Hobbit first or not, whichever you prefer - there's a summary of The Hobbit at the beginning of most editions of the ...
Depending on how curious your are you might be interested in the book "Finding God in the Lord of the Rings" It goes into a lot of detail explaining what a lot of the symbols meant.