Answer The current Eldar codex is 4th edition however it can be used for 5th edition.
Dark Eldar are one of the least popular teams so there codex and stuff will take some time to be updated
On the 3rd edition :(
Read your codex
the latest one was in 2006
look In the codex's
YES
Check out the chaos daemons codex.
Different types of Eldar use different weapons - buy the codex and find out which ones are which for yourself, like the rest of us do.
The current rumor is it is skipping 5th ed and coming out after the 6th edition is released.
AnswerThe Eldar Revenant titan is 800pts, the Eldar Phantom titan is 2000, and the Eldar Warlock titan is 2500pts.
In the codex it will tell what is allowed.
Yes codex edition is the best its 70 pounds + you get the most stuff in codex so its also a bargain