[thstone]

Option 2.

You have a working transponder (pill), ECU, and CLU. No reason to spend money on those components.

Replace the ignition lock and the door locks with a matching key and transfer the pill into that new key.

Option 1 is more expensive than Option 2 and achieves the same result.
Option 3 is a security risk and doesn't really solve the root problem, though it might be a temporary fix to get the car back on the road to give you time to execute Option 2.