There are many online jobs that you can start up with little or no capital.

These include;
-Google adsense (where you make money by letting google place adverts on your site or blog)
-Information marketing (all about selling information on what you know best, using the internet as a medium. You can package your information in an e-book form and sell them online)
-Affiliate marketing (here you sell peoples products and get percentage commission)
-Data entry jobs (help many companies fill forms, register emails, translate, etc. Work as a freelancer and get paid)

Others include;
-Sms short code registration
-Earn extra money with facebook apps
-Earn money through classified ads
-Web designing/domain selling
-Visa card reselling, etc

I'm making money online through some of these listed above, they are not difficult to learn as they require no experience so long you can read and surf the web. I'll recommend www.ewealth9ja.com for you to learn all these if you're interested