Just apply online at the Illinois State Police website. Either take a picture against a white background or go to Walgreens and take a passport picture there (you'll have to scan it into a computer that way), and pay with a debit or credit card. You will need a laptop or desktop computer, because the website is not optimized for mobile phones.
If you really need step by step help, or have to use cash, yes. You can also apply online from home with a credit card.
Yes
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