Hayes,
HERE is the link to the run-down of the specs for an 05 4Runner.
To quickly answer your questions, all 4th Gen 4Runners have CDL and ATRAC. I have heard that the ATRAC is a bit toned down from the FJC version, but I am not sure. And the 4th Gens do use Torsen Center diffs. Hope that site answers all of your questions for you.