The Liberty Bell has not been rung since 1846.

Without knowing for absolute certain, I would expect close to at least one hour. The exhibit is fairly small and there is very limited space around the Liberty Bell itself.

It was damaged when being moved.

Depending on the few factors: 1) time of travel- summer is always the busiest for tourism 2) what exactly you want from this tour- just be near the bell and take a photo? You can take a photo from the outside window to avoid crowds and go. For the inside- 1-2 hours if you are REEAAALLY into history 3) For just the photo coming down there after hours will be the best with the least amount of crowds

Yes, you must go through the security check and the bell was inside. You can take the picture inside.

I think your question would be better answered by the National Park Service or city of Philadelphia. Try to contact both. Good luck.

Park at the Visitor center it’s within walking distance to almost everywhere.

Liberty Bell is free and doesn't require a ticket or reservation. Just go whenever you choose. Just remember certain times will be busier than others. We went Saturday late afternoon and it was packed.