Hide price AND manufacturer A-Z list

[donykko]

Hello,  I am new to the forum so forgive trivial questions if any.
I am building a site which sell photos
I need help on two matters:

a) how to hide product price in the main page where photos are shown (in fact I have only 4 prices and I would like to show them ONLY in the detail page of each photo)

b) I set to show manufatcures (authors in my case) on the left of the template but ALL manufacturers are there and I would like an A-Z list which shows only manufacture with names in the selected letter.

Anyone can help?

Thanks a lot in advance.
Dony