Hi,
If you want to remove the add to cart for a product, you have several solutions:
- you could set the quantity of the product to 0
- you could set a sale start date in the future or a sale end date in the past
- you could set no price for it and have the "display add to cart button for free products" setting turned off
That will apply both on the product page and the listing.
Regarding the contact us button, it's only made to be displayed on the product page.
If you want it on the listing, you'll have to edit the file "listing_img_title" of the view "product" via the menu Display>Views and add custom PHP code for that there.