How can I set notations for different instruments in Logic?
You will have better luck if you post your question at the Apple Support Communities discussion forum for Logic Studio.

https://discussions.apple.com/community/professional_applications/logic_studio

For instance, see this post: "How do you set up Logic Pro 9 for transposing instruments?"

I would also suggest that if you are serious about working with sheet music and arranging parts for orchestral ensembles, that you look into creating your scores in the Sibelius or Finale dedicated music notation programs. Logic's sheet music capabilities are quite limited by comparison. Sibelius and Finale both have excellent capabilities for playing back your sheet music score with virtual instrument libraries. After your score is complete, you can move to Logic for recording audio if that is required.