nsathees

1) Place the adsence within <div align=centrer> </div>
2) <a href="http://whatEverTheLink"><img src="newsletter2.jpg" /><a/>

Ok first for the files . . .
Take a back up of the database. Use phpmyadmin within your cpanel for this.
Then download all the files from your root folder and compress it to zip or rar

hand over both of them to the buyer.
To transfer the domain name you should unlock the domain and get the transfer code and hand over that too.

the buyer can transfer the domain to any domain registrar with the code.

Did you download a fresh copy of WP?
if not do that!

http://wordpress.org/support/topic/php-fatal-error-call-to-undefined-function-is_network_admin?replies=9

you have declared the value for $blue in function file. The wordpress reads only the functions from there. Thus the variable $blue value not declared.

Need to add the code to your search page within theme dir.

http://codex.wordpress.org/Function_Reference/the_post_thumbnail

try removing

#content {
float: left;
}