Is there any Morrowind mod, or resource pack that adds Oblivion style traps? Like when you are in an Alyied ruin and you step on somthign which triggers somthign to fly at you.

Midgetalien's Neverhalls/Forgottenhalls have traps of this nature. Very well implemented as well.

Depending on what exactly you're looking for, the traps in Darknut's Greater Dwemer Ruins might be worth checking out. They're not exactly Oblivion-style but they do occur in real time, not just as lock-traps.

wasn't there a mod that let the player set out a bear trap on the ground?? (I remember a youtube video with a circular shaped pointy teeth trap thingy that snaps shut on the foot of a lesser bonewalker, but I don't know where to find the mod)

ST