C# windows service

Question

I need to write a C# 2010 windows service that calls a console application at different times. Since I have not written a windows service before, can you tell me the following:
 
1. How do you setup a windows service initally? Is it a windows service a desktop application, console application, or what kind of an application is it?
 
2. How to you include a timer in the application so it executes at specified time periods?
 
Can you tell me and/or point me to references that will answer these questions listed above for me