How can I add a product with a limited quanity aviable?

and every time this product is selected it decrease from the original  amount by one till the end the option should be hidden.

Hi,

I presume that you are looking for a widget such as:

Gift Registry

Ticket Purchases

Do let us know if they are as well as if they are not and if you have any further questions.

You can see here How to Add a Widget to your Form.

Best Regards,
Ben