the 2004 Verona uses different spark plugs. it has weird 3-prong plugs from NGK, BKUR6ETB that's good for 30,000 miles. you cannot check or adjust the gap. They're available at the dealer, and not really too expensive.
but be aware a Craftsman or Napa spark plug socket will not fit
good call...I actually made my socket fit by putting the rubber "grabber" part of the spark plug socket into a regular (non-spark plug) 5/8" deep socket. it's small enough diameter to fit down the spark plug tube.
The transmission fluid is an exclusive fluid to the Verona and the Forenza. If you can find ESSO LT 71141, or TOTAL ATF H50235, use that (I bet not), otherwise you'll have to get the fluid at the dealership for something like $18/quart. Draining, filling, and checking fluid level require a special tool (an 8mm square pipe plug socket), and has to be done where you can get under the car with it running and level (like a lift), so I really would recommend a shop do it.
Coolant is just regular ol' green coolant. nothing really special...just drain (there's a drain on the radiator, just have the overflow tank cap off), and fill. run it till the fans come on, keeping it full, then shut it off. once it's cool, top if back off and you should be good.
Some Verona's have a fuel filter located under the car right in front of the right rear wheel. some don't. if not, it just won't be there.