Hi,
I've just finished replacing the front and rear discs, pads and rebuilt the calipers on my glanza.
It's very simple.
Simply undo 2 caliper bolts remove the caliper / suspend it with a cable tie from the shocks / spring, then there are 2 more bolts holding the pad carrier to the hub. remove those.
Take the pad carrier away and swap out the old pads with new pads with the clips in the same way.
Then you'll have to rewind the caliper piston. I bought a rewind kit so I have it for the future but you could use say pliers in the grooves. Wind the piston all the way back.
Bolt the pad carrier back on to the hub / brake disc with the 2 bolts that you undid.
Bolt the caliper back on, 2 bolts and that's it!