Well, just like the title says, I’m interested on where I could find more info on Elves and Dwarves as Luke and co. imagined them.
For Elves, at least, try this thread: http://www.burningwheel.org/forum/showthread.php?12517-Elves-at-War
The works of JRR Tolkien.
It’s all between the lines of the lifepaths, dude.
The Hobbit, The Lord of the Rings (esp. the Appendices) and The Silmarillion were major sources of inspiration.
In Morgoth’s Ring, the 10th volume of The History of Middle-earth, there is a chapter entitled “Laws and Customs among the Eldar” — Several essays and legends on the Eldar, particularly mating and naming customs of the Elves, and Tolkien’s conceptions of the soul and body (Wikipedia).