Other ways of earning money.!!!

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Other than posting messages in various forums, can any body tell me the simple and elegant ways of making money, through work from opportunities,which is open internationally, for persons like me who have no knowledge in software implementation,website designing etc. One can take for granted that i'm ready to work atleast 5 hours daily on the internet with all dedication. The thing is I tried in registering with some sites which offer free registration and tried to earn money. But after the registeration process is complete, you are asked to buy some kind of purchase, with your credit card or in whatever form it may be. I cant afford to have a credit card due to hardships in my family.Even the computer, i'm owning now is on a loan agreement. So can anyone tell me a legal way to earn without initial investment or any kind of upfront costs?