Can some one tell me when putting adsense adds on my site do I have to get a new code to put the same size and style add on more than one page. Or do I reuse the same code.
Each and every web page Google adsence provide provide new adsence code. which provided by Google account.
Same code is enough, if your website's homepage has huge difference with single page, then you can consider add ads unit.
Same code can be used on any number of pages, any number of websites and any number of domains, as far as you are not breaking any google policy. Different codes are just for diferent size, look and channel tracking, other wise you can use the same at multiple locations.