Letting a pro se applicant know the fees isn't legal advise.
That might be true.
Still, as a pro se plaintiff, he has to know everything about everything just as a lawyer would, including knowing where to look for court fees.
Using Cook County as an example, all I did was google it, the court website came up. I clicked on the link for filing fees and got this:
There's are also links to court rules on this page:
I think it is a situation where nobody wants to get involved.
I think it's more like nobody has to get involved.
The reason he's getting nowhere is because he's done something wrong.
For example, if he had properly filed and served the summons and complaint the summons would have given the defendant X number of days to file an answer. If no answer was filed he would have to move for a default judgment.
You wrote that he "sent" the lawsuit to the defendant. Depending on the court level that might not be proper service. It's generally OK in small claims court, but generally requires a process server in higher courts.
You also wrote that he cited statutes and cases in his lawsuit. That's also likely to be improper. In the opening complaint one genrally just lists the allegations. After the defendant files an answer, discovery ensues.
Whatever county he is suing in, he ought to be able to get the local court fees off the court's website.
As for the how, well, I posted a link to the page with the Illinois court rules.