<title></title>
<h1 class="entry-title">welcome</h1>
<h2 class="site-description"></h2>
<h1 class="site-title"></h1>


where do i find those files if any one have used this theme before ?

If you have notepad ++ or something similar you could search through all files in folder with search command

for the title usually your index and for the other stuff usually your css file