for the guitar-vocals: a Talk Box
for the rest, you need some kind of synth emulator:
-a multi-FX with a decent synth patch (usually these combine arpegiators, pitch shifters, slow phaser/flanger)
-exciters can be helpful to change the harmonic content
-modelling based pre-amps/multiFX tend to have synth patches as well
http://en.wikipedia.org/wiki/Robot_Rock_%28song%29
BTW Daft Punk is not techno
