Here's a solution that uses the titletoc package; the important part of the code is
% chapter formatting in toc
\titlecontents{chapter}
[0.0cm] % left margin
{} % above code
{% % numbered format
{\llap{\thecontentspage\hspace{.5cm}}\thecontentslabel~}%
}%
{} % unnumbered format
{} % filler-page-format, e.g dots
Here's a complete MWE to play with.
% arara: pdflatex
% arara: pdflatex
\documentclass{book}
\usepackage{lipsum}
\usepackage{titlesec}
\usepackage{titletoc}
% chapter formatting in toc
\titlecontents{chapter}
[0.0cm] % left margin
{} % above code
{% % numbered format
{\llap{\thecontentspage\hspace{.5cm}}\thecontentslabel~}%
}%
{} % unnumbered format
{} % filler-page-format, e.g dots
\begin{document}
\tableofcontents
\chapter{mychapter}
\section{mysection}
\subsection{mysubsection}
\section{mysection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\chapter{mychapter}
\section{mysection}
\subsection{mysubsection}
\section{mysection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\subsection{mysubsection}
\chapter{mychapter}
\end{document}
Here is another approach. What it does is to check at the end of the document the values of the figure and table counters, and add to the .aux file a boolean flag setting depending on whether these values are zero or positive.
Then you have on next run \iffigures and \iftables which allow you to act conditionally.
In the code below, perhaps the \global are not really needed, I didn't check.
See also a variant at bottom which does not use the figure/table counters because they might well be reset to zero due to document sectioning (as pointed out by egreg in a comment).
\documentclass[10pt,twocolumn]{article}
\usepackage{lipsum}
\usepackage[margin=0.75in]{geometry}
\usepackage{float}
\floatstyle{boxed}
\restylefloat{figure}
\restylefloat{table}
\newif\iffigures
\newif\iftables
\makeatletter
\AtEndDocument {%
\if@filesw
\ifnum\value{figure}=\z@ % no figures
\immediate\write\@mainaux {\global\string\figuresfalse}%
\else
\immediate\write\@mainaux {\global\string\figurestrue}%
\fi
\ifnum\value{table}=\z@ % no tables
\immediate\write\@mainaux {\global\string\tablesfalse}%
\else
\immediate\write\@mainaux {\global\string\tablestrue}%
\fi
\fi
}
\makeatother
% for the purpose of testing
% this will make a MWE without tables
\long\def\IGNORE #1\ENDIGNORE{}
% uncomment to make a MWE with tables
% \let\IGNORE\empty
% \let\ENDIGNORE\empty
\begin{document}
\tableofcontents
%
\iffigures
\addcontentsline{toc}{section}{List of Figures}
\listoffigures
\fi
%
\iftables
\addcontentsline{toc}{section}{List of Table}
\listoftables
\fi
\section{First section}
\lipsum[\inputlineno]
\begin{figure}[H]\centering
\LaTeX\LaTeX
\caption{my figure}
\end{figure}
\lipsum[\inputlineno]
\begin{figure}[H]\centering
\LaTeX\TeX
\caption{another figure}
\end{figure}
\section{Second section}
\lipsum[\inputlineno]
\IGNORE
\begin{table}[H]\centering
\TeX\LaTeX
\caption{my table}
\end{table}
\ENDIGNORE
\lipsum[\inputlineno]
\IGNORE
\begin{table}[H]\centering
\TeX\TeX
\caption{another table}
\end{table}
\ENDIGNORE
\lipsum[\inputlineno]
\end{document}
Here is for a document with figures but no tables:
And if tables are present:
Three compilations needed.
Variant. I don't know to what extent patching \figure and \table as here is OK, depends perhaps on float related packages. At the worst I guess doing the patches immediately after \begin{document} should be enough (at the end of preamble might not be enough if some package does stuff during At Begin Document).
\documentclass[10pt,twocolumn]{article}
\usepackage{lipsum}
\usepackage[margin=0.75in]{geometry}
\usepackage{float}
\floatstyle{boxed}
\restylefloat{figure}
\restylefloat{table}
\newif\iffigures
\newif\iftables
\makeatletter
\let\OLDfigure\figure
\def\figure {\figures@in@document\OLDfigure }
\let\OLDtable\table
\def\table {\tables@in@document\OLDtable }
\def\figures@in@document {%
\immediate\write\@mainaux {\global\string\figurestrue}%
\global\let\figures@in@document\empty
}
\def\tables@in@document {%
\immediate\write\@mainaux {\global\string\tablestrue}%
\global\let\tables@in@document\empty
}
\makeatother
% for the purpose of testing
% this will make a MWE without tables
\long\def\IGNORE #1\ENDIGNORE{}
% uncomment to make a MWE with tables
%\let\IGNORE\empty
%\let\ENDIGNORE\empty
\begin{document}
\tableofcontents
%
\iffigures
\addcontentsline{toc}{section}{List of Figures}
\listoffigures
\fi
%
\iftables
\addcontentsline{toc}{section}{List of Table}
\listoftables
\fi
\section{First section}
\lipsum[\inputlineno]
\begin{figure}[H]\centering
\LaTeX\LaTeX
\caption{my figure}
\end{figure}
\lipsum[\inputlineno]
\begin{figure}[H]\centering
\LaTeX\TeX
\caption{another figure}
\end{figure}
\section{Second section}
\lipsum[\inputlineno]
\IGNORE
\begin{table}[H]\centering
\TeX\LaTeX
\caption{my table}
\end{table}
\ENDIGNORE
\lipsum[\inputlineno]
\IGNORE
\begin{table}[H]\centering
\TeX\TeX
\caption{another table}
\end{table}
\ENDIGNORE
\lipsum[\inputlineno]
\end{document}
Best Answer
Make a copy of
\@chapterand then redefine\@chapterto add the word "Chap"; from the point on where the word must not appear, restore the original meaning of\@chapter:An image of the resulting ToC: