I just finished the install myself and you should not need the camber kit for these cars.
As for the front noise you hear, I do not have that noise but did you install the supplied plastic dust boot? I was advised not to install this as it will make a clicking noise and will eventually break and fall off. That may be your noise. I simply used my rubber dust boots from the stock rear suspension and placed them on the front TEIN struts and so far it is working without noise.
For the rear, I don't have a metal sound like you described, but I do hear an audible psssh of air when going over bumps. I emailed TEIN and they say that is normal depending on the application.
How did you tighten the main rod nut? Did you use an impact gun or something else? The instructions say to avoid an impact gun as it can cause internal damage to the nut inside. Hopefully you didn't do that. If you did not use the impact gun, I found it was a pain to tighten these nuts without the main rod spinning also. My brother held the metal washer with vise gribs while I tightened the nut. Maybe the nut is not tight enough and you have some play.
Also, make sure the metal washer in the back is facing upwards like a cereal bowl \_____/
You don't want it to be inverted like an upside down cereal bowl.
Hope this helps out some.
I'm very impressed with this suspension. I have it set on 5 and it feels like a stock MSP, only lower.
Mark