If you want to work for online jobs with Google then you can register with adsense program : www.google.com/adsense – You should have website then only you may join with adsnese program. I hope most of the people get approval from adsense team with in one or two days. Some of them get approval more than two days to six months.
You may use your gmail account to open your adsense account because it is the best way to make it easy to work with adsense account. So you just create a email account with gmail then you can join with adsense. If you already have a gmail account then you just use that account to open an adsense account.
How to earn money from this? If you have a website then you can register with Google Adsense to get approval to make money. Because you should have proper website with good content to apply for Google adsense. Moreover, you should have good traffic to your website to earn money from it. How to get good traffic to your website? Search Engine Optimization is giving you the best search engine results to your website through good optimization. Also you should have basic knowledge about Google Adsense Program policies to use it proper way.