Here are some resource links that will help you get started learning the Entity Framework.
Learn Entity Framework (MSDN site) Entity Framework
101 LINQ Examples – Great Resource to get you started writing queries (C#) 101 LINQ Samples

POCO
Working with POCO Entities

POCO Proxies
POCO Proxies Part 1 - ADO.NET Blog - Site Home - MSDN Blogs
POCO Proxies Part 2- Serializing POCO Proxies - ADO.NET Blog - Site Home - MSDN Blogs

POCO Example:
http://www.pluralsight-training.net/microsoft/players/PsodPlayer?author=julie-lerman&name=ef4-and-pocos&mode=live&clip=0&course=ef4-fundamentals