I was asked to have my Introduction and Summary section uncounted. However, if I use \section* it doesn't appear in the Table of Contents which is undesired.
EDIT:
The proposed solution doesn't work:

I have no idea what the 'List of figures' stands for in there.
I have implemented it just like this:
\tableofcontents
\addcontentsline{toc}{Úvod}{\vspace{10pt}}
\rule[0pt]{0mm}{10pt}
Also the compilator tells me:
! Missing \endcsname inserted.
EDIT2: Of course it doesn't work. I am an idiot. Should be:
\tableofcontents
\addcontentsline{toc}{section}{Úvod\vspace{0pt}}
\rule[0pt]{0mm}{10pt}