1) HPV is responsible for warts on your hands or any part of the body, although the ones on your hand are not usually transmitted sexually, they are just common warts. The type of HPV that causes common warts is 2 and 7, wheras the types that cause the majority of genital warts are 6 and 11. 6 and 11 also cause oral warts. Seeing as the wart went away and didn't reaccur (providing its been months since) then you can assume you have a dormant type of HPV in your body and are now clear of that one, though it can reappear at anytime.
2) In the majority of cases there are more than one initial outbreak. Usually though, the first outbreak is the worst one. It differs between people. In the majority of people after 2 years the warts clear and don't come back. There is a smal minority of people who have stubborn warts which reacur for years after. This could be due to lack of health, a weak immune system or luck. Stress has been known to aggrivate HPV as has smoking and drinking.
3) Say you have genital warts (type 6 and 11) they could also appear in and around the mouth. This would occur only if you were to give oral sex to someone who has warts on there genitals. There is little known about oral HPV as it is so rare. It won't spread from your genitals to your mouth unless you give oral sex to someone infected. I once read it is possible for severe cases of genital warts to spread to the anus despite no intercourse taking place in that region. I have also heard from a few people confused as they have anal warts dispite never having anal sex... this may be why, but again, there is little info on this.
4) reoccurances would occur around the same area of infecion. If you have genital warts, they would reappear on your genitals. Not necesarily in the same exact place of the last warts.
5) The difference is low risk causes warts which are not cancerous and do not cause any other health problems. High risk causes cell changes in the cervix which can sometime lead to cancer. It can also cause genital cancers in men though this is rare. Here is a link to a page stating all the different stains of HPV and what each strain causes.
There are no tests for men to see if they have low risk or high risk HPV. They can tell if you have low risk HPV by a physical exam.
Hope I have helped!