Yes they make just about any rim to fit cars these days but remember the 20 inch tires will be a very low profile and you will loose your comfortable ride. The low profile will have a really stiff sidewall so you loose a lot of your give in the sidewalls.
Yes it will
yes
Only if the wheel will clear the brake caliper.Only if the wheel will clear the brake caliper.
no unless you want to cut into the wheel well. i have 20's on mine and they barely fit.
15 X 6 steel rims were standard equipment so yes you can.The 16 inch aluminum alloy rims were an option.
Yes
no.
yes
I have 22 inch chrome rims will they fit on my 08 impala
16 inch
yes
are you serious. no you cannot put 17 inch tires on 16 inch rims