In both the baby shots the light is coming from the top of the head and the eye sockets are dark (raccoon eyes), which gives the baby a kind of sinister lighting effect look. Fill light and/or being more aware of the angle of the light is the cure for raccoon eyes.
For the car shot poor lighting again plays a role. The human eye is naturally drawn to the brighter parts of an image. In the car shot the background is bright, not the car. The side of the car is bright, not the front. The sidfe of the car even has discrete bright spots because the sunlight is dappled. The front of the car is about the last place a human eye will look, but it should be the first place someone looks. Note how bright the drivers side windows are.
An almost required accessory for doing car photography outside is a circluar polarizing (CPL) filter. A CPL filter can be used to minimize reflections on a car.
At any rate photography is almost entirely about using light effectively, so you may want to persue getting a good grounding in the fundamentals of photographic lightiing.
Light Science and Magic, Fourth Edition: An Introduction to Photographic Lighting