Some advice...

Hi,

1. You can go in the menu Display->Content modules. There, edit the HikaShop cart module. You will find an option to hide the proceed to checkout button.
2. You can go in the config and under the tab Display, you'll find a zone where you can edit the front end CSS of HikaShop. There, you can add the CSS below to hide the add to cart button of the notice popup:
#hikashop_add_to_cart_checkout_div{display:none;}
3. Supposing that you create a menu of type listing of products, you can go in the menu Display->Content menus and edit its options. There, on the right side, you will have an option to display the add to cart button for each product of the listing.
4. You can go in the config and under the tab Languages, you will be able to edit your translation file. There, you can use the override zone to change the translation of the "add to cart" text:
www.hikashop.com/download/languages.html#modify

The path of the CSS file for the front end is media/com_hikashop/css/frontend_default.css
But you should not edit it directly and use the interface of the configuration, as explained in my post. That way, you will be able to easily update hikashop, without loosing your modifications.

Maybe you have have the joomla cache activated ?

For that, you need to edit the file listing of the view product and add that php line near the top (after the <?php opening tag for example):
$this->params->set('show_quantity_field',1);
That will activate the display of the quantity box and the +- for the add to cart button on the listing of products.
Then, you can go in your module/menu which lists your products and toggle on the add to cart button display option if that's not already done.