Tournament rules questions

[felwred]

Hi all (first I have to say it is great that the actual Munchkin staff gets involved to answer questions). I about to go into my first tournament and have some tournament questions:
1. The tournament rule sheet says that the level counter app and the Sherpa are always allowed. It also says that you can only play 1 more item than the fewest items someone else at the table plays.
1a. Do the app and sherpa count as items towards this limit?
1b. If you have bookmarks, do each of the bookmarks count as an item or does the pack of bookmarks count as one item?
1c. When you use coins in game, do you get them back at the end of the game?

2. Do you have to explain the rules for any items you use when you declare you are going to use the item in a tournament game (meaning - can you just say, I am using the app or a bookmark or do you have to explain what they do)? It seems like if someone has a stack of bookmarks, that could take forever but if they have some obscure items, it could let someone win the game without anyone being able to stop them.

Thank you!

Fred

3.