Yup, these were from the 2nd edition starter. These days, they're just regular gretchin with grotblastas or whatever they call the gretchin gun now.
Image 2: Space Ork Boyz
Likewise, from the 2nd ed starter. Originally were armed with bolt pistols and axes, with the bolt pistols now counting as sluggas.
Image 3: (My best guess) Rogue Trader Space Orks
Mostly. Looks like some 3rd ed Ork Boy parts mixed in there, and the guy at the back with the sword is a WHFB
Image 4 & 5: They're all metal and already have primer applied so I figured they were a unit, but I'm not so sure. The 2 in "Image 6" looks like they're from a MekBoyz crew but I can't tell if they go with any of the others.
Just mixed boys, mostly. The guy with the big gun is an old Deffskull Loota, and the unprimed one that's standing up is a Shokk Attack Gun mek without his gun.
Image 6: MekBoyz
Image 7: I'm wondering if he's maybe a Goff Warboss for the army of Boyz in image 2 and may be associated with the units in images 8, 9, and 10.
Not a Warboss, just a Goff Nob.
Image 8: No idea.
Image 9: No idea.
Assorted boyz. Guy with a peak cap is a Blood Axe. GW
used to have a range of different boyz and nobz for the different clans.
Image 10: No idea.
That's the shokk attack mek again.
Image 11: No idea.
Bauhaus troopers from Warzone.