\documentclass{article}
\usepackage{a4wide}
\usepackage[latin1]{inputenc}
% \usepackage[german]{babel}
\usepackage{float}
\usepackage{graphics}
\begin{document}
\bibliographystyle{unsrt}

\sffamily

\pagestyle{empty}
\pagenumbering{roman}

%\input cover

\newpage
\pagestyle{plain}
\tableofcontents
\newpage

\pagestyle{plain}
\pagenumbering{arabic}
% plain für unten, empty für leer

\input{body}
\end{document}