I've gone through all of page 1 and keep coming up with the same problem. As I said I'm really new to coding so I'm blind really as to what the commands are that I'm typing in.
Did you try this?
sudo apg-get update
After that try installing the packages again.
And be sure there are no line breaks inside your command. So be careful with copy and paste.
Try
https://wiki.ubuntuusers.de/apt/apt-get/It´s a good and informative wiki.