If it's an annual lease it can't be terminated without your consent. The new owner must abide by the terms of the lease. Now if you're month to month then all that is needed is the property notice, usually 30 days.

The only way a lease can be altered or terminated is if all parties agree or if a judge voids the lease through a court order.

No. In any state a new owner must abide by the terms of the lease. But they may offer you money to move out. If it's enough, take it. But you'll never be able to stay past the lease if they want you out.

No. The lease goes with the property. Any new owner is required to honor it.