You need only 2 files with i386 at the end. These are latest legacy drivers. It is easier that to build them yourself.
Create a folder in your home folder and call it AMD. Put there these 2 files.
Then in terminal run commands
sudo dpkg -i *.deb
I was a bit suspicious using this fix and downloading the files, but it worked.
In learning Linux, I've installed/messed up stuff at the command line, and have been pulling my hear out to try and get my graphic card drivers working.