Shopify Basket Edit

Good afternoon,
1. I would like that price would update automatically as quantity in the basket is updated, as right now i need to press update button "atnaujinti" to get it updated. (Please see picture Update)
2. As it will update automatically I don't need button "Atnaujinti", would like it deleted. (Please see picture Atnaujinti).
3. Instead of title:default title I would like to see product stock quantity as it shows in the product page. (Please see picture change).
4. The product quantity in the basket can be changed to any even surpass stock levels which means even if I've got only 10 products in the stock I can change quantity to 11 in the basket and it will allow customers to purchase unavailable stock. I would like that changing product quantity in the basket would be limited by stock levels.