Mandas

I just read potassium permanganate does not react with benzene or alkanes. You know I said cyclohexane not cyclohexaxene.

Is there a reagents or mechanism that allows you to displace or get rid of a methyl group attached to a sp3 carbon like taking away the methyl group from methylcyclohexane? Of aromatics, my understanding is the methyl group in toulene cannot be removed because it would disrupt the benzene ring which is very stable/low energy