I like Linux Mint, and I have been using it as my primary Linux distribution for a couple of years now, but one thing that bugged me was the lack of scrollbars for some applications.
I had Googled around, and found some solutions, unfortunately while the solutions worked for most applications, some of my most frequently used applications like the terminal, Nemo (the file manager), and gedit were still lacking scrollbars.
I finally found a solution, first, I had to install the scrollbar-overlay package:
sudo apt-get install overlay-scrollbar
Then, from a terminal window, run the following command:
gsettings set com.canonical.desktop.interface scrollbar-mode normal
I finally have a scrollbar in all of my applications. That really was harder to figure out than it should have been.