Hello,
im now currently using virtuemart with my website which i bought on template monster. Here is my URL http://www.truhlarstvi-purkard.cz// I would love to, my products page to look like this http://dvere-sleva.cz/eshop/interierove-dvere-laminat/interierove-dvere-deco/interierove-dvere-deco-10.html. instead of this http://www.truhlarstvi-purkard.cz/index.php/template-settings/galla-11-przezroczysta-detail which is my layout now. Can i use some extensions or something else? Im really new to all this stuff right now so i do not know myself.
There is no extension to do that. You will have to rewrite the VirtueMart template and css overrides that are included in your Joomla template to give the required layout & styling.
The overrides should be in /templates/theme589/html/com_virtuemart/
http://docs.virtuemart.net/tutorials/templating-layouts.html
http://forum.virtuemart.net/index.php?topic=108212.0