Problem with Table of Contents, include sections/subsections

\maketitle from llncs class adds the title and author names to the ToC automatically.

This can be prevented by a redefinition of \maketitle (which is too long here) or a patching:

\usepackage{xpatch}



\makeatletter
\xpatchcmd{\maketitle}{%
  \addtocontents{toc}{\noexpand\protect\noexpand\authcount{\the\c@auco}}%
  \addcontentsline{toc}{author}{\toc@uthor}%
}{% Replace by 'nothing'
}{\typeout{success}}{\typeout{failed}}

\xpatchcmd{\maketitle}{%
  \if!\the\toctitle!\addcontentsline{toc}{title}{\@title}\else
  \addcontentsline{toc}{title}{\the\toctitle}\fi
}{%
  % Replace by nothing
}{\typeout{Success}}{\typeout{Failed patching!}}
\makeatother

The code removes \addcontentsline... etc from the \maketitle command.

The \makeatletter...\makeatother pair is essential here, otherwise the patching would fail.

In addition, the 'template' is not very well designed, as is often the case with 'templates'.

\documentclass{llncs}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% package sillabazione italiana e uso lettere accentate
\usepackage[T1]{fontenc}
\usepackage[italian]{babel}
\usepackage[utf8]{inputenc}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage{url}
\usepackage{xspace}

\makeatletter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands.
%\usepackage{manifest}

\makeatother

\usepackage{enumitem} %%per elenchi puntati

\usepackage{fancyhdr} %%per numero di pagina

%%%%%%%%%%%%%%%%% NUMERO DI PAGINA
\pagestyle{fancy}
\usepackage{lastpage}
\fancyhf{}
\rhead{Relazione progetto di "Ingegneria dei Sistemi Software"}
\rfoot{Page \thepage\ of \pageref{LastPage}}

%%%%%%%
 \newif\ifpdf
 \ifx\pdfoutput\undefined
 \pdffalse % we are not running PDFLaTeX
 \else
 \pdfoutput=1 % we are running PDFLaTeX
 \pdftrue
 \fi
%%%%%%%
 \ifpdf
 \usepackage[pdftex]{graphicx}
 \graphicspath{ {img/} } 
 \else
 \usepackage{graphicx}
 \graphicspath{ {img/} } 
 \fi
%%%%%%%%%%%%%%%
 \ifpdf
 \DeclareGraphicsExtensions{.pdf, .jpg, .tif}
 \else
 \DeclareGraphicsExtensions{.eps, .jpg}
 \fi
%%%%%%%%%%%%%%%

\newcommand{\java}{\textsf{Java}}
\newcommand{\contact}{\emph{Contact}}
\newcommand{\corecl}{\texttt{corecl}}
\newcommand{\medcl}{\texttt{medcl}}
\newcommand{\msgcl}{\texttt{msgcl}}
\newcommand{\android}{\texttt{Android}}
\newcommand{\dsl}{\texttt{DSL}}
\newcommand{\jazz}{\texttt{Jazz}}
\newcommand{\rtc}{\texttt{RTC}}
\newcommand{\ide}{\texttt{Contact-ide}}
\newcommand{\xtext}{\texttt{XText}}
\newcommand{\xpand}{\texttt{Xpand}}
\newcommand{\xtend}{\texttt{Xtend}}
\newcommand{\pojo}{\texttt{POJO}}
\newcommand{\junit}{\texttt{JUnit}}

\newcommand{\action}[1]{\texttt{#1}\xspace}
\newcommand{\code}[1]{{\small{\texttt{#1}}}\xspace}
\newcommand{\codescript}[1]{{\scriptsize{\texttt{#1}}}\xspace}

% Cross-referencing
\newcommand{\labelsec}[1]{\label{sec:#1}}
\newcommand{\xs}[1]{\sectionname~\ref{sec:#1}}
\newcommand{\xsp}[1]{\sectionname~\ref{sec:#1} \onpagename~\pageref{sec:#1}}
\newcommand{\labelssec}[1]{\label{ssec:#1}}
\newcommand{\xss}[1]{\subsectionname~\ref{ssec:#1}}
\newcommand{\xssp}[1]{\subsectionname~\ref{ssec:#1} \onpagename~\pageref{ssec:#1}}
\newcommand{\labelsssec}[1]{\label{sssec:#1}}
\newcommand{\xsss}[1]{\subsectionname~\ref{sssec:#1}}
\newcommand{\xsssp}[1]{\subsectionname~\ref{sssec:#1} \onpagename~\pageref{sssec:#1}}
\newcommand{\labelfig}[1]{\label{fig:#1}}
\newcommand{\xf}[1]{\figurename~\ref{fig:#1}}
\newcommand{\xfp}[1]{\figurename~\ref{fig:#1} \onpagename~\pageref{fig:#1}}
\newcommand{\labeltab}[1]{\label{tab:#1}}
\newcommand{\xt}[1]{\tablename~\ref{tab:#1}}
\newcommand{\xtp}[1]{\tablename~\ref{tab:#1} \onpagename~\pageref{tab:#1}}
% Category Names
\newcommand{\sectionname}{Section}
\newcommand{\subsectionname}{Subsection}
\newcommand{\sectionsname}{Sections}
\newcommand{\subsectionsname}{Subsections}
\newcommand{\secname}{\sectionname}
\newcommand{\ssecname}{\subsectionname}
\newcommand{\secsname}{\sectionsname}
\newcommand{\ssecsname}{\subsectionsname}
\newcommand{\onpagename}{on page}

\newcommand{\xauthA}{Nicola Casadei}
\newcommand{\xauthB}{Marco Benedetti}
\newcommand{\xauthC}{Erica Marchi}
\newcommand{\xauthD}{Mattia Ricci}
\newcommand{\xfaculty}{II Faculty Engineering and Informatic Science}
\newcommand{\xunibo}{Alma Mater Studiorum -- University of Bologna}
\newcommand{\xaddrCE}{via Sacchi 3}
\newcommand{\xcityCE}{47023 Cesena, Italy}

%
% Comments
%

%%% \newcommand{\todo}[1]{\bf{TODO:}\emph{#1}}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}

\usepackage{xpatch}



\makeatletter
\xpatchcmd{\maketitle}{%
  \addtocontents{toc}{\noexpand\protect\noexpand\authcount{\the\c@auco}}%
  \addcontentsline{toc}{author}{\toc@uthor}%
}{% Replace by 'nothing'
}{\typeout{success}}{\typeout{failed}}

\xpatchcmd{\maketitle}{%
  \if!\the\toctitle!\addcontentsline{toc}{title}{\@title}\else
  \addcontentsline{toc}{title}{\the\toctitle}\fi
}{%
  % Replace by nothing
}{\typeout{Success}}{\typeout{Failed patching!}}
\makeatother

\begin{document}

\title{Esame finale A.A. 2016/2017\\
  Ingegneria dei Sistemi Software}

%%% \author{\xauthA \and \xauthB}
\author{\xauthA \\ \xauthB \\ \xauthC \\ \xauthD}

\institute{%
  %%% \xunibo\\\xaddrCE, \xcityCE\\\email{\{nameA.studentA, nameB.studentB\}@studio.unibo.it}
  \xunibo\\\xaddrCE, \xcityCE\\\email\ [email protected]
}

\maketitle

% ==================INDEX
\newpage 
\tableofcontents

\newpage
\setcounter{page}{1}
\section{Intro}
\labelsec{Intro}

\section{Vision}
\labelsec{Vision}

..... other sections

\end{document}