What are the cold blooded animals that have scales and breathe with their lungs?

Reptiles.

The most common reptiles include alligators, crocodiles, lizards, snakes, tortoises and turtles. Reptiles are air-breathing animals, although many live not only on land but in water. The most noticeable feature of reptiles are the scales that cover their body. The majority of reptiles lay eggs to give birth to their young.

Reptiles are often called cold-blooded because they can't regulate their own body temperature.