Errors when running apt-get update? [duplicate]
Most of your PPA are outdated or doesn't exist anymore. For example the last one "http://ppa.launchpad.net/amith/ubuntutools/ubuntu/dists/raring/main/binary-i386/Packages" should be replaced with "http://ppa.launchpad.net/amith/ubuntutools/ubuntu/dists/quantal/main/binary-i386/Packages".
Look at your /etc/sources.list (or the files in /etc/sources.list.d) and remove or fix those lines that cause the error.
UPDATE:
The answer here should help.