altezzas are tacky looking and leak, don't get them.
nobody makes a cold air intake, but bolting a cone filter onto the MAF is fairly simple and just as good as a cold air intake.
Nobody makes aftermarket headlight assemblies, but upgrading the bulbs can improve light output, I recommend sylvania silverstars.
Andy's Auto Sport - Body Kits and Carbon Fiber Hoods Superstore!
sells a body kit for the gen 4 taurus, but it isn't exactly "minor", it's actually fairly radical.