Because of tcolorbox I need the newest version of TeXLive! But how to get it on Linux Mint 17 Qiana Cinnamon? I tried to install it with some PPA's which doesn't worked. What to do?
TeX - LaTeX Stack Exchange is a question and answer site for users of TeX, LaTeX, ConTeXt, and related typesetting systems. It only takes a minute to sign up.Sign up to join this community
This answer also replies your last question about TeXLive 2014/2015 (that is cooking yet).
In Mint usually you have not installed TeXlive base (as Ubuntu) so you don't need to uninstall anything before. You can download from the CTAN an iso file with the TeXLive 2014 compilation from here http://mirror.ctan.org/systems/texlive/Images/texlive2014.iso or if you prefer it, there is a script that you can use for install it too.
In the case of the iso image, be sure you have installed the
perl-tk library before because otherwise you won't be able to run the GUI of the installer. For TeXlive 2015 (available next summer) you can use a very similar path, now you can use TeXlive 2014 if you need the ultimate release of the packages.