- For the font, install the Tweak tools so that you can set the fonts anyway you want them.
Open a Terminal window, and type in the following (also installing the TTF fonts):
sudo apt-get install unity-tweak-tool gnome-tweak-tool font-freefont-ttf
Then after those are installed, press the Windows Key on the keyboard and in the search box type in tweak
which will bring you to the tweak tools. Then select the font you want in the fonts section.
For Skype, open a Terminal window and type in:
sudo apt-get install skype
The file explorer is called Nautilus that is already installed. You can get to it by pressing the Windows Key and in the search box type in files
There would be a lot of installation with an application called WINE to get OneNote working. You can install PlayOnLinux
sudo apt-get install playonlinux
to install Microsoft Office. However, WINE is always being improved on and there is possibilities that there could be failures running non-linux applications such as Microsoft Office.
As far as the Windows installation that you had, if you did not choose to have Ubuntu installed along side Windows, it may have formatted your drive losing your Windows installation.