<font color="blue">Should or do i need the liscence? </font>
Short answer: <font color="red">YES </font>
These radios use the GMRS frequencies, otherwise they wouldn't be called FRS/GMRS but simply FRS radios.
Utilizing the GMRS frequencies has the same effect as having a higher wattage output - e.g. the FCC requires you to have a license to use them, even if you are transmitting on one of the first 7 channels shared with FRS and at a lower power output.
The last line in the description where it says "Easy FCC self-licensing information is included in the owners manual" I think helps to "set the concrete" on this (e.g. FRS do not have any licensing requirements.)
All is not lost - GMRS is a great thing and with a bit more looking on-line, you can get much more powerful radios with additional features for cheaper than the Wal-mart ones you are looking at. The FCC "gauntlet" isn't that hard to navigate, (you can do everything from your PC in order to get your license), so I'd say if you want GMRS radios - go for it. If you simply want FRS and want to stay away from any licensing issues, just make sure not to buy any radios that have GMRS stamped anywhere on them.