When using \tableofcontents my TOC gets generated like this:

Why does the word Contents appear twice and what is the easiest way of changing it to only show the header and not the big heading. How can I change the actual word to something like "Table of Contents", and also switch it to a different font like Times New Roman? I am using \documentclass[paper=a5,pagesize=pdftex]{scrbook} in this instance and the current font seems to be associated with that.
Although when using
\dottedcontents{chapter}[2.5em]{}{2.3em}{1pc}
it comes out like this:

Which looks a little better around the contents, but still with the main heading and header in the same fashion.