First time in Leipzig

[Loko_Ultra_Bosnia]

My German is very very bad, so I will write in English. On Monday, I will be in Leipzig for the first time. I follow football for whole my life, and I am a very big fan of Lokomotive and, of course, the ultras of Loko. So, I have some questions for all of you:

1. Where can I get stuff from the Loko Ultras (t shirt etc)
2. How can I get the ticket/s for games
3. Is there a pub (or pubs) for Loko Ultras
4. Where is the best food in Leipzig :D

Thanks for answers in advance. Greetings from Bosnia!