Is an Elevated Patch of Melanized Skin?

Mole: aka Nevus; an elevated patch of melanized skin, often with hair.

Which layer of epidermis consists of up to 30 layers of dead cells?

The stratum corneum is the outermost layer of the epidermis, and is made up of 10 to 30 thin layers of continually shedding, dead keratinocytes.

What layer of the skin is not actually part of the skin?

Hypodermis. The hypodermis (also called the subcutis or subcutaneous layer) functions to connect the integument (epidermis and dermis) to the underlying muscles and organs. The hypodermis is not considered part of the skin, but has several important functions.