So I made a house mod awhile back, and I now realized that I put the house in a really inconvenient place, and I wanted to move it. I moved it, but when I put the house down the first time when I first made it, I had flattened the terrain, and now it just looks ugly. It was right outside of Balmora, and I want to release this to Planet Elder Scrolls, but with that terrain messed up it looks really bad. Is there anyway to copy multiple objects from one CS, and paste it to another CS?

Just use TESAME or Enchanted Editor to delete all the references you made to that cell.
This will reset the changes to default.

Do this after you have moved your house and finished your mod, and it is clean of everything but these references you want to delete.

What do the different colors mean?

What does this post mean?

Turn off grid and angle snap, hold control and highlight every part you wish to move first, hit ctrl+x to cut, and at your new location ctrl+V to paste, you may have to rearrange your stuff.

as for the old location you can either use the soften vertices tool and try to make it more natural, or disable references with tesame in that cell