There are several ways to get info about your webcam. Check the output of commands 'lsusb' and 'cat /proc/bus/usb/devices'. Also try unplugging it, plugging it back in and checking the last few lines of the output of the 'dmesg' command.
If you have a working driver the camera you get low-level access to the camera through the video4linux interface (v4l). There are plenty of apps which you can then use. Try searching for 'webcam' on www.freshmeat.net
There are plenty of cheap and bodgy webcams out there, so best not to expect too much.