Total cost. The price paid for a security plus the broker's commission and any accrued interest that is owed to the seller (in the case of a bond).
If you want to become a medical examiner, you must earn a medical degree (M.D.). Once you have earned your medical degree, you can seek out knowledge in a pathology residency. Following your residency, you'll sub-specialize in a forensic pathology fellowship.
A medical examiner by definition is a physician ... In most cases, they are trained to be forensic pathologists... and are appointed to their positions. To be a coroner, you just have to be able to be elected to the job. You've got places where the local feed store operator is a coroner.