Here you go with your answer :
1) You don't need to generate any VAT/CST bill unless you have order for Orissa ( You need 402A form to make item deliver to Orissa buyer.) To avoid this, Kindly refund any Orissa buyer who purchase item.
2) Before your powership activate, you will get your packing material in bulk. You don't have to worry about packing material, ebay will surely help you with this.
3) Once the order place, you will see in your paisapay, a logo of fedex, bluedart, or Aramax. If there is no logo against your sold paisapay, you need to send item normally.
You don't have to worry about this. Before Powership live on your account, you will get call from ebay and they will teach you each and everything.
Some people can go their whole lives and never really live for a single minute.