No. The closest you can come to that is a 402 conference where your lawyer, the State and the judge can meet in conference off the record to discuss aspects of your case toward a disposition.
Possible but unlikely. In Illinois, you can only get supervision twice in a one year period. A driving class IS supervision. If you get supervision on one and a conviction on the other, you should not be suspended unless you had another conviction within 24 months.
For an Aggravated Discharge of a Firearm, your friend falls under Illinois "Truth in Sentencing". He must serve 85% of the 4 years, he will get credit for time served before imposition of the sentence and he may possibly get any discretionary credit the institution he is in sees fit to give.
If the officer did in fact send information to the Illinois Secretary of State about your possession of a fake ID, your Illinois driving privileges will be suspended for a year. You can contest the suspension or petition the Secretary of State for a restricted driving permit if it happens.