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Thanks for sharing. There are tons of passion flower varieties, all having variations in their hardiness, and some are even native to the U.S. and considered semi-tropical. These will even over winter in zones 5-6 with some protection, while others handle temps down to 28 F. I am assuming that this would be one of those varieties. For more information on the various types of passion flower plant, this article will help: https://www.gardeningknowhow.com/ornamental/vines/passion-flower/passion-flower-varieties.htm

Only a few varieties of passion flower are winter hardy in gardening zone 6, including Maypop and purple passion vines. If you have one of these, you can plant it outside. Planting it in the early spring is the best option, but it is possible to plant outside now if you make sure to mulch the plant to protect it during the winter. Here is more information:

https://www.gardeningknowhow.com/ornamental/vines/passion-flower/preparing-a-passion-flower-vine-for-winter.htm
https://www.gardeningknowhow.com/ornamental/vines/passion-flower/transplanting-a-passion-vine.htm

That appears to be passiflora edulis... In either case... Yes, those pods do contain seeds. You will find these seeds very difficult to germinate. They need scarification (scratching to the seed coat) and stratification (about 4-6 weeks of temps between 37 and 50 degrees) before they will germinate. Even then, most will not sprout. In some cases you can take tip cuttings and propagate the plant asexually. If the vine sprouts multiple vines, then it is possible to split them given that you keep some roots on the split vine when you transplant. I recommend making a tea from the flowers. Very calming and relaxing. It is an ideal sleep remedy.

This appears to be an insect problem. Consult this article for more information: https://www.gardeningknowhow.com/ornamental/vines/passion-flower/passion-vine-diseases.htm

Butterflies will not harm the passion flower. This is caused by another pest. This article will help: https://www.gardeningknowhow.com/ornamental/vines/passion-flower/passion-flower-vine-problems.htm

Some people are allergic to herbal products made from passionflower, but I'm not sure if this allergy would be triggered by just touching the vine. Many plants do have irritating sap when broken open. It is also possible (if it's not in your own garden) that the plant has been sprayed with a pesticide that causes the reaction. I'm not sure what causes your reaction, but it's probably best to avoid it just in case! Check with your doctor or health care provider.