Scanners work with an application called sane but you need the relevant backend drivers for the individual scanner. You will find the details of setting up your scanner
here. I would also suggest installing the packages hotplug and discover to make your life a bit easier as well. You just need to read the documentation carefully and work through the installation. it can be daunting but a good learning experience as well. I have been very impressed with the performance of sane with my usb scanner.