1996 Lincoln Town Car - How Do I Take Out A Screw

I am working on disabling body parts of a 1996 Lincoln Town Car. I need to help. I do not know what tool is needed to take off the following screw or how to take off the screw. I tested out a salvage yard by using torx and all I did was strip the screw. I can’t strip these screws. Please offer directions of which tool I need or how to take them off. Pictures of the link below, they are in photobucket:

First view of the screw. Located towards the front of passenger side almost reaching the passenger door.
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1038_zpse6b9c03e.jpg.html?sort=3&o=4

Close up view of the first view.
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1036_zpsac51a9a2.jpg.html?sort=3&o=6

Another close up view of the first view
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1037_zps03f42bc6.jpg.html?sort=3&o=5

Second view of the screw. Located behind the passenger front wheel in the wheel well when I removed the mud flaps.
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1039_zpsf8ddb468.jpg.html?sort=3&o=3

Third view of the screw. Located on the bumper
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1041_zps45bb84e9.jpg.html?sort=3&o=1

Close up view of the third view.
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1040_zps8382478f.jpg.html?sort=3&o=2

Two photos of my damaged 1996 Lincoln Town Car
http://s1155.photobucket.com/user/johnp_atx/media/dae9f8a8-7ce7-4de3-80f6-c69288275014_zps78ab6b3d.jpg.html?sort=3&o=8
http://s1155.photobucket.com/user/johnp_atx/media/2419ca68-a354-442f-b9cb-96a641309ec5_zps03a88547.jpg.html?sort=3&o=8

Two photos of what I've done so far. Took off the hood, header, bumper, bumper cover. Next on the list, taking off the radiator support and passenger fender.
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1042_zpse9e524a3.jpg.html?sort=3&o=0
http://s1155.photobucket.com/user/johnp_atx/media/DSCN1016_zps828cdba8.jpg.html?sort=3&o=7

Those rocker panel pieces are held on by plastic clips, the "screw" you are looking at is a rivet.
It may be a plastic rivet(like used to hold the plate holder to the front bumper cover) and you just have to cut/drill it out.

Thank you. I am going to try it out on Tuesday or Wednesday. I will let you know how it goes. Thank you again.