Those figures are absolutely worthless...
You should give them to me, so I can dispose of them properly.
Seriously, though...
You have a good batch there. Aside from not having the bases, you have to separate them into the figures classification, then go from there.
Easy one, those plastics, would be around 10.00 per box. They have newer edition "Old World" figures, but there are a lot of oldhammer players that love the old figures. 10.00 bucks on the auctions would do you well. And if you get more, that's all the more the better.
Everyone else would be by their unit-
Executioners, 5-25 each, or by unit maybe around 50 bucks.
Witches, 5-25 each, or by unit maybe 50 bucks.
Assassin, 10-50 bucks
Dark Elf Sorcerer, 1
Bolt thrower, The second guy for the Bolt thrower MIGHT BE, right on the end of the Executioner batch. (He's the guy with the sword, and pointing forward.) If not, He's a Dark Elf Champion for the Spearmen.
The Bolt thrower is about 25-30.00.
And finally, the Cold Ones you have three without tails. so that's going to affect what people are going to want to pay, but their going to want them, then get the tails somewhere else.
Once again, if you can add in the square bases, that would make them a little more, but in all, My assessment was in Generality, based on E Bay, and based on what I have paid for them in the past.
YMMV.
I hope that helps. You have a great set there.