I am a newbie to smartphones, I couldnt find a PDF reader for my 6260?
Is there any free pdf reader for 6260?

Amish.

PDF+ from the shop: http://www.allaboutsymbian.com/shop/

Or try Adobe's own Acrobat Reader for Series 60: http://www.adobe.com/products/acrobat/readerforsymbian.html

I wanted to know if there is a freeware for pdf viewing.
pdf+ is a paid software, I have not tried it. I will be installing and purchasing it works.
Adobe's viewer did not work, it said that the installation is over. It gave me a warning saying phone not supported. Its not present in the menu, nor do documents open using the viewer.

Amish.

Here some direct links to Symbian free PDF reader (http://symbiancorner.blogspot.com/2007/08/more-on-abobe-pdf-reader-applications.html)