No, we do not need air to hear sounds or see lights.
Hearing sounds: Sound is a vibration that travels through a medium, such as air, water, or solids. In the case of human hearing, the sound waves typically travel through the air and reach our ears. However, sound can also travel through other mediums. For example, sound can travel through water, which is why we can hear sounds underwater. In fact, some animals, such as dolphins and whales, use sound to communicate underwater where there is no air.
Seeing lights: The perception of light does not require a medium like air. Light is an electromagnetic wave, and it can travel through a vacuum, which is devoid of air or any other matter. This is why we can see the light from the Sun, even though there is no air in the vastness of space. When light encounters a medium like air, water, or glass, it may interact with the molecules in the medium and be refracted or scattered, which can affect how we perceive it, but the presence of air is not a requirement for the transmission of light.
In summary, while air is the medium through which sound waves typically travel and reach our ears, and it can affect the transmission of light, it is not a necessity for the perception of sound or light.