Just wonder as I see many AdWords Vouchers for sale here. Do you need to create a new account every time you use one in order to keep using Voucher? Thank you for help
Yes, you have to create new accounts. However, this is against TOS... so don't. I'd recommend sticking to one account, if you optimize enough PPC is easy and you will always turn a profit.
They're right. It's better to spend your time learning Adwords. If you get it right, your advertising will pay for itself.
1 voucher per 1 account,1 account for one person. Don't open new accounts just to use your voucher. Google will catch you.