The topic of HPV and genital warts is a complex one and the questions you are asking do not all have good answers. I will try to provide some facts. For addition information on this most common of STDs, I would suggest search for other HPV- and wart-related Q&A on this site, as well seeking addition information on sites such as the American Social health Association web-site (disclosure, Dr. Handsfield and I are both on the Board of ASHA)..
As you probably know. HPV is the most commonly acquired STD. HPV infections in women are better studied than for men. Over 85% of sexually active women will have HPV infection at some time in their lives (the number is probably similar for men). In some HPV will cause genital warts, in others it will not cause warts but may lead to changes in PAP smears in women- there is a similar situation in men but the frequency is far lower. In nearly everyone who gets HPV, warts or otherwise, the infections will resolve by themselves without therapy in 8-10 months. In a very small minority of women, HPV infection can persist and lead to the pre-cancerous lesions that PAP smears detect and which can then be treated. With this as background, on to your questions
1. Unlikely. HPV infections have a quality called "tropism" which means that infections of the genitals are not spread easily to other sorts of skin.
2. Not specifically. Start with the ASHA we site, then perhaps a call to your health department could lead to someone who is knowledgeable and good to work with.
3. Vanishingly rare. These infections are spread by direct contact.
4. I cannot and will not diagnose a rash over the net- it simply is not in your best interest. There are many potential causes of an anal rash. Hopefully through the sources mentioned in 2 above, you can identify a good health care provider to help sort this out.
5.. See 1. above. Extraordinarily low probability. I think you are overly concerned.
6. This makes little sense. It needs to be dealth with with a health care provider. Nothing you've said suggests you're at risk of dying of HPV related problems.
7. At present there are no therapeutic vaccines. This is an area of active research.
Hope this helps. Please no more- "what if" questions. EWH
Thank you very much for the information you provided. It was a big help.