I've got 2x10kg(22lb) dumbbells, can I do squats with that?
Yes, they'll be better than bodyweight squats anyway but you wont be getting the full benefit of heavier squats.
You can. You can squat with any weights, however it depends on how difficult it is for you to lift with them. If they are too light, get a barbell and add more weight onto it.
Night Stalker Robo
you can, but it's way to light