Suspension is the best way to get performance out of these cars. Mostly, search and read through the stickies on the page.

and
headlights: google/ebay depo auto lamps. they make black clear lensed ones.
tails: nightshades tint spray or tint film. google/ebay.
suspension: search. most people like tokico shocks w/ H&R springs or Eibach springs. BUY A WHITELINE OR TRD (impossible to find) SWAY BAR NOW. Best $150 you can throw at these cars.
1mz-fe engine: 5-speed swap and the TRD supercharger with all other necessary fuel mods.