Unfortunately though, a lot of the papers that turn up in Google Scholar are behind paywalls. It is very expensive to get hold of academic papers if you don't work/study somewhere with an institutional licence (anything from $10 upwards per paper).
Yup, that's the world of academic publishing unfortunately. A tip: often you can get a 'preprint' copy of the paper from one of the authors' websites. Probably not strictly legal, but it does happen a lot.