Meldrew They all go in a drawer for safekeeping. :-)
1 - Group spring. Probably got a fancy name.
2 - Steam wand if you are a softy.
3 - 7 - Dunno.
8 - Gicleur - top of group.
9 - The key things that get moved by the brew lever cams - Probably got a fancy name.
10 - Machine screws. Hold on the top, sides or bottom.
11 - Gaskets - think these fit the brew lever and somewhere else on the group