Magento Help Needed

1. I need you to check the shopping cart its stops working suddenly nothing is coming when click on "Proceed to checkout" 2. You have to update Social Media profile links and Social Shares code add on the top of website 3. I will give you content for 6 pages you have to updates content and keywords 4. Install Captcha on "Help" right scroll bar contact form. 5. I want you to check for websites file is there hacking code installed because website some time stops working suddenly Please Bid only if you can start right a way i need a person to keep in contact with me on skype and update me about project.