You need to be Lv38 or higher, and obviously, have Dragonborn installed.
The quest can be started by reading one of the of the many 'Deathbrand' books you can find on Solstheim. Or, you can find the guarded Ancient Chest near Haknir's Shoal which will (as long as you are Lv38+) contain the Deathbrand Helm and start the quest also.
The Deathbrand set is just an enchanted set of heavy Stahlrim armour.
To fix the no quest items bug in Skyrim you have to download the most recent patch.
I got the quest but i didn't do it. Now i don't see the quest
It is part of the main quest. Delphine will give you this mission.
No!
CalIxto
You can fail side quest by killing someone important for the quest, but you can also fail a few quests by dropping a quest item.
You need to be Lv20 to start the 'Pieces of the Past' quest.
Usually, to get married in Skyrim, you will need to do a quest for the person you are trying to marry.
You can it's in the Companions Quests
Skyrim for Pimps - 2011 Quest for the Skeleton Horse 3-5 was released on: USA: 24 August 2012
It's a College of Winterhold quest. Just do those quests and you will stumble along the quest :)