With regard to question one. I don't often use yahoo mail so I am not sure what the options are. But for the most part an RSS feed is a news feed from someones website or blog etc. It's just another way to receive info from somebody. So as far which one to choose is based on what you want or who you want to follow.
As far as doing research with an RSS feed I am not sure I understand what you mean.
Second question: You don't need a real fancy site to make money on the Internet. The hardest thing on the internet is driving traffic to your website.
This is best done by a small niche area. You can very easly start off with writting a ebook for down load at say 3 or four dollars. Or building an AdSense site that in the begining can make 20bucks a month. There are lots of ways to do it. My point with the 20dollars in my sales copy is this. Once you know how to do this you simply repeat the process. And before long you are growing your income.
Hope that helped
