#1
How can i scream like pg. 99, city of caterpillar, funeral diner, pianos become the teeth etc. like what techinque?
#3
i personally prefer the latter because the tone to me is better and thats what im aiming for, **** my throat lol, but i cant get that sound of just screaming my throat out
#5
What you need is to get some overtones going to complement the meat of the screams (literally, the meat from your future vocal cords).

That's why I suggested the fry "filter." All it is is a buzzing in the back of your throat between where your uvula sits and about the elevation of your top front teeth. This will give you a larger more "screamy" sound while you still retain the throaty roar of your dying mucous membranes :P.

So do some exercises and focus on getting vibration back there and it should help. I use Vendara's Chewbacca exercises.

And then do as Deadsmileyface says and scream as loud as possible.

Caveat- I don't endorse beating the crap out of your throat but whatever.