1. The ages of the Endless from oldest to youngest are as follows:
Destiny, Death, Dream, Destruction, Desire, Despair (they're twins but desire is generally listed first), and Delirium (previously Delight).

2. the member of the Endless in the photo is Desire. I believe that picture is from The Wake when all of the family are sitting around the table waiting for the "new" Dream to come in after the wake has finished.