There is a chance that they will pick up an item if you throw it at them, it's not guaranteed. However you can use a dispenser to give them armor and weapons manually. Out of maybe 30 husks I spawned in, 2 picked up items, so it is quite rare.
Microsoft doesn't allow the "add server" option for security reasons, nor does the switch.
This is probably due to the poor connection you are having, it's too slow that it isn't able to process your request.
You have to download the music pack in the marketplace.
Are you hosting a server via the software available for windows 10, or are you trying to join a server already available (i.e the Hive, Lifeboat).
They haven't worked since 1.13, which is due to the implementation of the Render Dragon Engine.
This is probably the bug MCPE-21416, you should go upvote it.
This is because of world corruption or a run out a data storage space. There is a different bug with mobs despawning along chunk boundaries, which has been a well known bug, but I doubt that bug is the reason for the loss of your horse.
Duplicate of MCPE-58285
This may be related to entities despawning along chunk boundaries. If you can, try to isolate all villagers in the center of one chunk and see if they still despawn.
I can confirm this issue. On my realm, my friends and I used ender eyes and it brought us to a stronghold with no portal.
This is due to platform restrictions that Xbox has made, which Nintendo has too. It's only available on Windows 10 and mobile for security reasons.