Ok, I will be glad to try and help but just a few pointers first (honestly not intended in a critical way)
1) For the love of all things good consider reformating your post, one long paragraph that covers a wide variety of topics isn't encouraging people to help you.
2) Ask specific questions where possible (I know this is not allways the case). For example... "I am using Evolution version blah to access my pop3 accounts but it chokes with error blah when I try and retrieve my mail" rather than "my email is broken how do I fix it".
3) How do the machines "not see" each other? Can you ping between the systems? Is it just file sharing not working or do you lack any network connectivity?
4) What model is the printer? How is it shared? Can you query it? How are you sending test prints?
Regards
ed