Defiantly window tint... in that climate and with that color of car, window tint is a must. After that I would go with some red/clear taillights... your call on the headlights (they sound kinda ricey... but to each his own). Front grill looks kinda gawdy... so I would go there next. Lips on the front and back followed by engine mods (depending on route on what order you want to buy things).
Do not buy a tip for your car... that is just dumb, get an exhaust in some fashion or another as it will sound and look better than some chrome tip.
Lastly... you suck for having 5 lug