When I drive, I'm hearing like a whistling noise that sounds like some type of rattling.

It's hard to explain but it's on the passenger side maybe rear wheel.

My homeboy said I probably need to put more air in the tire but I don't get how that will make noise.

My tired are usually 43psi for front and 42 for the rear.

Naturally when I get time, I'll take it to a tire shop or mechanic

 

Do you have the stock wheels on the car? That PSI is pretty high...

 

Yes
I haven't put air in since I got it

 

In that case, it's way too high. The recommended cold pressure should be ~35 PSI. First order of business should be to let some air out of all four tires. That may not solve the noise issue but you'll get a much better (and safer) ride.

 

Thank you much

 

Upon inspection of my tired I see my back rim have 2 dents on it. I'm wondering if that would produce a noise while riding

 

Brakes. Need brakes and pads