Yes. He can place whatever reasonable restrictions he chooses. It is likely that he wants you to have renter insurance to protect against you doing something that causes a problem for other renters.
You can certainly refuse, but he can also give you a 30 day notice without any cause in most states.
Renters make a lease agreement with a landlord.
If he lost his renters privilege, he is no longer a landlord
No
No, landlord insurance does not provide protection to the renter. Landlord insurance simply covers the landlord if an issue that is of their fault arises. All other issues are at the renter's responsibility. All renters should acquire renters insurance.
If you rent it you can get renters INS
no
No. Signed is signed.
Is called a lease.
Yes.
Yes, after you are out a landlord can do anything with items you leave behind.
It completely depends on the situation. Was the lease broken by the tenant or the landlord?
Yes. The landlord cannot act until they have a court judgment against the tenant.