[Tex/LaTex] How to put roman numerals in table of contents before Introduction

Question

My counter is set from the Introduction and goes until the very end.

How can I set roman numerals before the Introduction in the toc?

My document class is:
\documentclass[12pt,chapterprefix]{scrreprt}

and to set the counter from the Introduction I used:
\addchap{Introduction}\setcounter{page}{1}

Answer 1

You can put the command \pagenumbering{roman} right after \begin{document}. When you want to switch to arabic pagenumbers (in your case right before the \tableofcontents) you have to put \clearpage\pagenumbering{arabic}. MWE to show the mechanism

\documentclass{article}
\usepackage{blindtext}
\begin{document}
\pagenumbering{roman}
\blindtext[5]
\clearpage
\pagenumbering{arabic}  %answer updated after egregs comment
\tableofcontents
\blinddocument
\end{document}