NO
In some states, they do. Here in NJ, they charge tax. They really shouldn't!
no
no
Illinois, because Illinois has made the sale; therefore, Illinois must charge you and pay the sales tax.
Sales tax is charged on parts, etc. not labor.
If the sale is via the internet and the California seller has no Illinois location, then no, you don't need to charge Illinois sales tax. You'll need to consult California tax law to know whether to charge him California tax, but probably don't need to charge it either. If the sale is in person in California, then yes, you should charge him California sales tax. If the sale is via the phone you could probably get away with calling it an internet sale and skip the tax, although it depends more on California tax law than Illinois tax law.
According to the Illinois Department of revenue, YES it is.
if you mean iTunes they charge .99, but after tax I think its about 1.08-1.09
Itunes tax is always being changed. As of August 2010 i can tell you it is about 15%.
There is a state income tax in Illinois.
You need to have iTunes to charge your iPod Touch. Does your PS3 have iTunes?
Illinois has a flat tax for individual income.