Can a canadian citizen with permanent resident status living in the U.S. with a deferred prosecution dui travel to Canada?

Yes, since you are a Canadian citizen you shouldn't experience any problems entering your own country. The DWI conviction bars only non-Canadians.

I have a mistimeaner dwi and on probation for a year.am I allowed to go on vacation out of the country?I have no restrictions

Generally yes but check with your attorney and probation officer first.

What are the chances of getting my underage drinking and driving charge dropped to a lower charge?

Well technically the elements of the offense can easily be proven by the state based upon the facts you presented. However, that does not mean...

I received my 3rd DUI more than 10 years ago I was arrested for public consumption but wasn't driving can they cancel my license

Yes if you have a no use restriction on your license (commonly called a B Card).

I agree it is always cheaper in long run to just pay for everything now and get valid. Borrow from friends, family or someone so that this doesn't...

Can I beat the case?

You raise interesting points and they may be of assistance in defending your case. You should consult with an experienced DUI attorney in your...

Can I travel to and from Mexico ?

If you have active warrants they will likely discover them at the border.

Round two...arrested for DUI in August...pulled over for 'high beams'...pled guilty as I didn't know the ramifications.

You may want to speak with an attorney to discuss whether it is worth challenging since you have already been convicted of DWI. There may or may...

Best to address these issues now as they always catch up with you in the end. Good luck.

Should I tell his probation officer

A good friend would find him help for his addiction before doing anything. Good luck,