Okay, so I installed a few extra desktop environments, one of which was the Xubuntu pack, and it replaced my login screen and Boot GUI as mentioned. I made the mistake of trying to purge Lightdm and reinstalling it, but the boot GUI hasn’t changed and the login screen is even further from what I wanted. What can I do to correct it? All I want is what came with Ubuntu 13.10 Saucy.
For boot logo
This will show all your themes. Just choose appropriate number.
For login screen
Set Lightdm as default Desktop Manager: