When I first arrived I had to look for a padlock for my son's locker at school and I hadn't a clue where to start.

Confuser, the easiest places, without a car, are probably Coop City in Bel Air and Manor department store near Cornivan station (they have loads of household things in the basement). Also MParc in Carouge if that is handy for you (I find it more difficult because of the buses I need to take to get there).

You're welcome to PM me if you need any help.