The first one is a 1978-80 GM mid-size coupe, I believe it is an Olds Cutlass Supreme based on the shape of the front end. The other plausible guess is the Pontiac Grand Prix, but I do not see a pointy front end.

Second one is a 1988-91 Ford Crown Victoria.

Third one is a Cadillac Eldorado from the 1979-85 years. I think it is from the newer years than a 1979-81 model, but I am not certain.

I have a few other vehicles I need help identifying, please.
The first is this 2-door brownish car. Hopefully the different angles will provide some help.







This second one is a bit trickier. Major thanks if someone can ID this one correctly. This was an undercover LAPD sedan, if it's of any help. I'm guessing it's either a Ford or Chevrolet.



Here is the last one.





Much thanks to everyone for their help and effort.