Add \usepackage{enumitem} to customize the labels. All the label syntax used below come from existing existing answers. To display a caret, preface it with \string. For the $, preface it with \ and for ], preface with \char. For the backslash, \textbackslash works here.
\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{enumitem}
\begin{document}
\begin{itemize}[labelindent=1.5em,labelsep=1cm,leftmargin=*]
\item[+] A
\item[-] B
\item[\string^] C %http://tex.stackexchange.com/questions/77646/how-to-typset-the-symbol-caret-circumflex-hat
\item [\$] D
\item [\char`\]] E
\item [\textbackslash] F %http://tex.stackexchange.com/questions/9363/how-does-one-insert-a-backslash-or-a-tilde-into-latex
\end{itemize}
\end{document}
