You will have to write and addendum explaining the four incidents exactly as you described them. The last one is stickier, since it was just a fine for tte he false alarm, but you will still have to disclose. Anyway, you can search for my thread on speeding trickets, and it appears from what everyone says that non-serious infractions do not have an effect on their admissions. These would certainly be non serious things as compared to the big deals like fraud. THe reason for disclosures is eventual difficulty getting admitted to the pard, and frankly underages won't.
I don't think you'll have to give dean certs from any schools that weren't specifically asked for either.
Glad you realized drinking is a problem, and cleaned up. Good luck!