It doesn't appear to me you used urpmi to install the rpm.
It seemes like you are getting these messeges due to missing dependencies. A dependency is just a piece of softrware that is required to make a package work. Easyiest way to install this, would be to set up urpmi sources. FAQ's will walk you through setting urpmi up, which sources to get and so fourth. In this case, you would add the plf site, cooker, and contrib. Thsee are the most common sources. Then you can either open your software mamanger and install that rpm you want to install or as root from a console, you can also install by typing urpmi libfreetype6-2.1.7-4. This will install the rpms, plus dependencies required.