How can someone who has no capital find the capital needed to start his own business?
Credit, Debt etc. What are alternative ways like?
The best alternative is to get credit from financial institutions especially the small to medium scale financial creditors who's core mandate is to invest into new company's. You should have good credit as well as some sort of credible collateral.
I am not sure about most of the countries, but in my country availing loan needs more documents and some times we need to follow cross routes too (like bribes and recommendations). Literally you may need to expose all your business secrets to avail loans. Loans will not be suitable for unique concept based new business for that reasons.
Personally I never prefer going for loans for business purposes. I started my trading only after acquiring enough capital, similarly I will follow same methods for any business too.