Relace the gas tank.  Cut the rusted floor pans out and weld in new
metal.

The floor panel and the fender you can handle yourself if you want to
invest a bit in a small MIG welder and the metal forming tools to cut
the patch from raw flat stock.  

 Alternatively, you can search out 'rust repair panels' for most
newer cars - they are like the raw stampings the car body was built
from at the factory.  Keep cutting out the rusty bits around the hole
till you get all the rotten parts out, then cut your patch from the
repair panel to fit - leave an inch on all sides as a welding margin
weld it in.

 If you want to minimize bondo patching before painting on exterior
bits on fenders and doors, get a flanging tool to recess the welding
margin at the edges.  Then the patch sits flush.

 Then it's standard (easy but boring handwork) bodywork - grind the
welds down flush, rust preventative treatment, prime coat, sand, prime
again, sand again, paint coat, sand, paint again, undercoating, sound
padding, put the carpet back down.

 Do NOT try to patch a gas tank - much misery and potential danger
lies down that path.  Either order a new tank from the dealer, or find
a good one in a wrecking yard in the sun belt - somewhere they don't
salt the roads.

Totally unbolt the seat rails, pull it out (or flip it over) and
inspect the release system.  Either the pull rods for the release are
maladjusted and a quick tweak with pliers will fix it, or the latching
dogs are messed up and you need to replace the adjuster rails.

 --<< Bruce >>--

In article
<7c3ff00bfc38e2a0436d9cf8be6e1945@localhost.talkaboutautos.com>,

Take $5 from a haul away wrecker.
I'm serious, a rusted out car can become a coffin in an accident.