Your first picture shows a retainer that looks like aluminum. The weatherstripping is basically gone.
The second picture (attached with notes) shows that someone has replaced part of the floor and screwed it to the rocker where it's folded over the edge. The screws may hit the door and scar it. I'd recommend removing the screws and plug welding to hold the floor to the rocker panel. Someone has also glued some weatherstrip material to the rocker that doesn't belong there. The seal should be on the door, held on by the retainer strip. Your 4th picture shows what looks like an original steel retainer strip. That one may be salvageable, but replacements are available. I'd recommend replacing the aluminum strip as well, as that's going to cause corrosion problems with the dissimilar metals.
Your third and fifth picture are a bit unclear (I can't really see what you're trying to show there.)
Attachments
IMG_5198.jpg (236.81 KB, 48 downloads)


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.