If you need to adjust the skin tones of your people, you can try the Adjust Color for Skin Tone command. Use the Adjust Color Curves command for overall color adjustment. Usually working with this curve will do the trick, no matter what your color issues are.
Note that you can fix just selected portions of your image. Make a selection first and then apply the adjustment.
If you have any people or animals with nasty red-eye, use the Red Eye Removal or Color Replacement tool.
Remember to use the Zoom and Hand tools to magnify and navigate around your image, as needed.