Unwanted Sounds

I am a novice user of Audition 1.0. I have a wav file of my daughter's choir that I would like to clean up. Originally, there was a little bit of background buzz that I was able to get rid of quite easily. However, there are also some individual sounds of coughing and someone bumping the microphone, while the kids were singing, that I would also like to remove from the file. As I said earlier, I am a real novice at this, that's why I'm asking these very general questions. Thanks in advance for your help.