i want to add the contents eg Abstract in table of contents which should have a roman letter to it.. i have shown below

• Welcome to SE. Your question is quit common here. Do you "google" in SE and general for similar problem? – Zarko Apr 2 '16 at 16:53

Note the effect of \frontmatter and \mainmatter in this MWE. With these commands, the abstract could be a normal chapter of the front matter part.

\documentclass[oneside]{book}
\begin{document}
\frontmatter
\chapter{Abstract}
\chapter{Acknowledgements}
\tableofcontents
\mainmatter
\chapter{Introduction}
\section{Background}
\begin{figure} ... \caption{A figure} \end{figure}
\begin{table} ... \caption{A table}  \end{table}
\end{document}

• That adds the number of the last page of the list to the toc, which isn't a problem if the list is only one page long. – Johannes_B Apr 4 '16 at 8:57
• @Johannes_B Your are right, but I hoped that one can guess that the number also can be added starting a page, before of the list command. – Fran Apr 4 '16 at 20:41

The usage of tocbibind prevents explicit \addcontentsline for the LoF and LoT

\documentclass[oneside]{book}
\usepackage[nottoc]{tocbibind}
\begin{document}

\frontmatter
\chapter{Abstract}
\chapter{Acknowledgements}
\tableofcontents
\listoffigures
\listoftables
\mainmatter

\chapter{First chapter}
\section{Some about the theory on Brontosaurs}

\begin{figure}
\caption{A dummy figure}
\end{figure}

\begin{table}
\caption{A dummy table}
\end{table}
\end{document}


I may have misread the question- are you wanting to list the contents as an entry in the table of contents? If so, you could try this:

\tableofcontents

This will create an entry for the contents page in your table of contents. The position of the command \addcontentsline (i.e. before or after \tableofcontents) will determine the page number that LaTeX assigns the entry.
Provided you include this command after \pagenumbering{roman} and before \pagenumbering{arabic}, the page number will be Roman numerals as you desire (unless you are using the book document class, which I believe does this automatically if you declare \frontmatter, \mainmatter etc).