Just bought a 2010 Sedan; Any tips?

[DIPLOMATIC]

So I just bought a brand new 2010 Toyota Yaris Sedan and I must say I absolutely love it. The interior and exterior are both sporty and classy and the mpg definitely makes the car a total package.

As much as I like the look of the car, I am interested in doing some cosmetic upgrades. I am going to be painting the stock rims black and putting the silver toyota emblem over them, and painting the actual wheel base metallic silver so it will look like the interior of the car; black and silver.

I had some questions about possibly smoking out the headlights and tail lights, but I am new to this kind of thing. I also wanted to put a small spoiler on the car. Does anybody know any cost effective ways to do some upgrades to the car? Thanks in advance!