Have some questions

I have some ideas for opening an e-commerce store, I have some queries:
*I haven't yet decided a name yet, are old domains better than new reg ones?
* Should I go for wordpress or html5? I don't think hackers will be interested as much as my competitors trying to rip me off.
* Any method to automate customer support?
* What is the difference b/w VPS hosting and Cloud VPS hosting?
*How can I get sponsered if I think they can benefit from me too, And how much should I ask for Banner ads in CPM type model?
*How much do payment gateways charge? Escrow, ccavenue etc
*How do I prevent my competitor copying me? Trademark protects only from duplicated websites right?

I appreciate you all for helping me, I will give back to forum one day.

Any help appreciated