Per the in-game announcement: Legacy characters who owned mounts should now be able to find their critters in the Hanged Man stables. (Mount-worn containers like saddlebags and such are not functioning at the moment.)
They should have retained all their skills, descriptions (including custom descriptions if they had one), and any worn items they might have had. As the announcement states, however, the worn containers such as saddlebags are not functioning at this time.
Legacy mounts at the Hanged Man stables
Legacy mounts at the Hanged Man stables
[#GMCHAT] <Mirazia> I think you're enjoying this [mighty winter stuff] more than you realised
[#GMCHAT] <Rias> I AM AND IF THAT'S WRONG I DON'T WANT TO BE RIGHT
[#GMCHAT] <Rias> I AM AND IF THAT'S WRONG I DON'T WANT TO BE RIGHT