Cart on Woocommerce?

Question

WordPress

Please help.
There are 3 very important questions in an attempt to make a store on woocommerce.
I would be extremely grateful for advice.
1) How to limit the quantity of goods in the basket to 1 piece?
2) How to display the product description in the shopping cart? $product_description does not work
3) How to make the main page so that the address bar contains only the site address, a page of one of the categories
Website: dgt-itc.ru