You don't need a bracket to install a 97-99 Eclipse front bumper on a 95+ Talon, but you will need the 97-99 Eclipse headlights for it to fit (they have a slightly different shape).

I haven't taken off skirts myself, but from what I understand there are some bolts on the bottom, and they they are just clipped on (and there is some adhesive goo helping out). So I think you just undo a few bolts and then pull them off (someone correct me here if I'm wrong)

To install the 97-99 wing, you can either leave the old spoiler on there (doesn't look quite right in my opinion) or you have to remove the old spoiler and fill the holes. The new spoiler will need four new holes.