The ACT is graded in four sections: Verbal, Reading, Math, and Science analysis (basically charts, graphs, etc.) Each of these sections is graded up to 36, and the four scores are tallied together.
I got a 29 nearly every time I took it, then I finally got a 30 equivalent on the SAT--1340. I believe a 30 ACT is equal to about a 1320-1350 SAT.
As for your question about how to get a 36--NOBODY GETS A 36.
Ok, I'm sure some people have, but don't count on it. Anything above a 27 is considered "good", anything above a 30 is excellent.