Use it to load older stuff. I still have a Windows XP-era PC specifically for those stuff. It might be slow, but it mostly work better than emulating it, as emulations do cause some issues. Also, I saw that the HDD of your device is full according to the text on the picture. Remove some stuff by deleting files or doing a scan, or either do a fresh install of Mac OS.
It cant do wifi just fine. Wifi passwords these days are wpa2/psk. Something that no version of OSX on PowerPC can do.
It worked on wifi even itunes radio worked still.. and tried to get some apps and here is the outcome! --- Post updated ---
I have a 2005 Mac Mini running my entertainment system. Serves as a nice backbone to the system. Maybe that laptop could do the same?