Sounds like the template overrides you are using do not include the code to display the 'priceWithoutTax' - look at the override file [yourjoomlatemplate]/html/com_virtuemart/category.default.php and compare it with the default VM view file at components/com_virtuemart/views/category/tmpl/default.php
The code is easy to spot as it shows the language constant, COM_VIRTUEMART_PRODUCT_SALESPRICE_WITHOUT_TAX
You may have to edit your override file to include the right code.
I have no idea what you mean by "the news pro on front page" (certainly it is not standard VirtueMart) but the code for that may need checking, too.