Dear Sreenivasulu Nallani,
Thank you for taking interest in our products.
I think that there are two choices.
+ buy the quick start package.
After installing it, you have a site like our demo site.
+ register a membership on our site at
www.smartaddons.com/component/osemsc/register?step=step1
In this case, you have more right such as downloading many templates, quick start packages, ...
We always support you to answer all questions as soon as possible.
Example: about the logo, please do the following steps:
+ copy your logo to "templates/images" folder
+ go to Administrator => Extensions => Template Manager => smart_news25 - Default => Advanced Options => Override logo image => insert your logo title
Thanks