Not sure if I understand your question. But, the answer is no you cannot get HIV from smoking anything.
any amount of marijuana smoked will eventually show up in the urine.
That depends on how long ago you smoked it.
marijuana? yes.
yes
The same color it was before you smoked the marijuana, the color is not affected.
No but it will still show up in your hair.
probably in a hair test but not in urine
More than likely.
Yes they do and some of them will indicate if you smoked up to two months ago!
If you smoked it in the manner you described, it can show up in urine anywhere between 60-90 days after you last smoked.
http://www.marijuanapassion.com/How-Long-Does-Marijuana-Stay-In-Your-System.html
No. Unless you are a licensed medical marijuana user.