It might help if you describe it in more detail, but the gold color suggests Brass, and the fact that it looks like a master suggests that you are looking at a padlock! Do a search for "Padlock" on here or in your favorite search engine for more information and some pictures, etc...
Padlocks are a good place to start... read through the forums, especially the Faqs and general information to get yourself started! There is a wealth of information in there so make sure you dig.

There is plenty in there to get you started... also, search for a document called "The MIT guide to lockpicking" for some great info to get started...
Oh, and Welcome if you are new!
