Is there any way that we can use to earn money from Paypal without a credit card?

You can if you verify your bank account. Or try this technique:

http://www.hellogiri.com/how-to-open-pa ... k-account/

hmm, To have a VCC also it requires a credit card... Its just the same as having a credit card

Not all virtual credit cards require a normal credit card. Shop around.

It's either you'll have a bank account registered for them or have a CC.. Else, use AlertPay

I haven't used AlertPay recently, but in my past experiences I found their fees to be rather high.

cashlagoon.com just fill in some surveys everyday and you can withdraw the cash whenever you want, even when u have $0.50.