Points 1-4 are correct.
1. You want to add Paypal and credit card as payment gateway. (add to cart and checkout function for multiple items)
2. Sign up page is not working.
3. Facebook button.
4. Youtube button.
just see only 4 points and tell me if you can do it
This is quite urgent so bid only if you can work over the weekend also and deliver it as fast as possible.