no
In order to marry anyone you first need the Amulet of Mara. You can acquire this amulet from Maramal at the Bee and Barb in Riften.
Usually, to get married in Skyrim, you will need to do a quest for the person you are trying to marry.
No you can't
Isnt nocturnal a daedra? if so then i doubt it
No, there is a limited selection of people you can marry, you can only choose from amongst those.
No sorry thats a fault with the game there sorting it in the next patch
Ysolda because she will end up being an asset to you
This sounds like a mod, not part of the vanilla game. You'd have to see what the mod says.
You can marry any NPC character in Skyrim through the use of console commands. With the exception of Serana from the Dawnguard DLC (There might be a way to marry her, but I haven't found it). Vivienne is not a character who can be married without console commands.
Your race has no part in getting married, I don't think there is any wood elf partners to marry though, so you may have to settle for another race you want to marry.
Marrying an NPC in Skyrim yields several benefits:They will follow youSome have shops from which you can take a 50% cutThey will cook you a meal once per dayThey offer a sleeping benefit if you choose to sleep at home