The humans are Fright Features figures.  Venkman has a couple of scotch tape spots easy to remove.  Winston has a little white crusty spots, also easy to remove.  Ray just need a soap wash, and his head pulls off easily, not sure that's supposed to happen, but the action features still work on all three.  

Jail Jaw ghost.

Soar Throat ghost.

Scream Roller 

Mini Goopers  - Brain Matter, Stomach Stuff

Boo-lett 1 & 2

the back door of the Ecto-1

One other ghost (orange)

One Prtoton Pack unknown origin

Incomplete ghost helicopter with propellor