Tholos

As said above, it is a way to like posts.
 
What they didn't mention is that if you give me ten thousand brohoofs, you automatically become an Admin.
 
There are three places you can view how many brohoofs you've received:
 
-When you scroll over somebody's name to the left of their post and it displays in that green box.

-The large green box to the right on their profile.

-Under "Community stats" on their profile.

 
Also, if you want to view how many brohoofs you have given, go to your profile and click on the button to the left that says 'stats'.

 

I am fairly sure that they belong in Non-Pony Artwork.

Banners are changed by the staff, it is not automatic. All users see the same banners at the same time.
 
Users submit banners via E-mail to the site staff, and if it happens to be selected, it gets used. Everybody is capable of sending in a banner, so it's not an exclusive thing.
 
To see who made the current banner, look towards the bottom left of the banner itself, for example, you can see that the current one was made by Rascal61.
 
There is no way to change the banners back, though, sorry about that.
 
I hope this helped.

Neither of those things were removed by the new theme, perhaps you accidentally disabled them yourself?
 
Make sure that you haven't excluded recent topics from appearing.

I'll give you a step-by-step.
 
Go into your user settings, the page should look like this:

 
Click on the button I've outlined in red there.
 
 
A box like this should pop up:

 
Once that box is on your screen, click on this button: 
 
 
It should ask you to paste a URL. You get this URL by finding the image you want to use, right clicking, and then clicking "Copy image URL". Right click and then paste that URL into the box that appeared when you clicked on , and then click OK.
 
Once you've added all the images you want, click 'Finish and save'.

It doesn't appear you can add custom emoticons to your channels. I am fairly sure the emoticons are universal between all of the channels hosted on EQ TV.

For avatars, you simply need to make a gif that is 150x150 (Or 150x200 if you're a subscriber/donor). It also must be smaller than 100 Kilobytes.
 
You will need a program that is capable of making animated gifs in order to resize one to the correct dimensions. If you have a particular picture in mind, I would be more than glad to resize it for you. Just PM me a link to the picture you want to use as your avatar.
 
For backgrounds, it is the same concept, except the limit is 255 Kilobytes. It's a bit more complicated since you'll rarely find gifs of a high quality that both fill most (or all) of the screen and are also under 255 Kilobytes. Perhaps you'd want a smaller gif and then you could tile it in order to save yourself some frustration in the long run.
 
If you need any more help, don't hesitate to let me know.