Just a few questions if anyone could help it would be great

1. Where can I obtain a service manual/repairs guide? I want to do a few things up (e.g washers dont work) and would like a manual to help out but all the ones on ebay (haynes 1995-1999) Do not cover V6 they say.
2. The car has no service history and is a 1998 model with 160,000 miles on the clock and was wanting to ask what I should get done to service and maintain its up to date (dont get me wrong it does not feel like its done that many miles at all) things like Cam belt changes I am not sure of.
3. Any advise on the best way to sport up the engine or body work? I dont want to go over body but just get the full potentail out the engine and make it look smart...I thought other people may have done things that they could advise (or even show of about) any pics for ideas will be welcome.
All in all the advise details from you guys sound great and I really have fallen for my 406 more then any car I have ever owned (and thats about 15 others) So thanks in advance to and help idea given.