Should I hire an attorney?

What are you going to court about? Arguably he broke the lease in multiple ways -- first by not making the residence habitable (no heat), Then you...

What do i do?

I suggest you handle this as a landlord.. after all you are the landlord to your friend who is your subtenant. Give him a 7 day notice to quit for...

Can I as a minor swear at an adult in Michigan

Generally its not illegal unless as the other attorney stated it rises to child abuse.

Can a person currently serving a 60-90yr sentence be released on an appeal bond?

With the facts you describe generally not since they are in the middle of their sentence. Now if it was immediately after the conviction and the...

As long as nine of the pictures are of underage children (e.g all actors are 18 or over) I do not think it is criminal... however it as not a good...

How should I handle this situation legally, and what steps should I take

I agree.. keep paying rent and keep good records of your interactions. If someone tries to interfere with your occupancy you have a defense.

What can do about enterprise doing this to me?

This is the reason you do things IN WRITING or in person and not just by a phone call.

Does business insurance generally cover expenses associated with representing a lawsuit?

It depends upon the policy and the lawsuit. Why would a deposition occur 800 miles away? If you are sued here the deposition will be here..

How can I be charged with conspiracy

I agree with the other attorney's advise: stop talking to him and retain a criminal attorney to represent you

Entrapment

I strongly advise you to retain a criminal attorney immediately.