How to retrieve all SharePoint objects based on sharepoint URL connected to?

Hi all, Can anyone help me in the following two scenarios.

1) If I pass the Sharepoint site url, is it possible to retrieve all sharepoint objects such as all available lists(provided by Sharepoint) and custom list(Created by user), page layouts, site layouts, web templates, site templates, sites and workspaces, libraries etc.(provided by sharepoint)) nad custom list of all above.

For he above requirement, can I use Sharepoint Object model.

Can anyone provide me a sample code.

2) Is it possible to cache(or store) the above information in an XML file so that I can use this XML as reference further.

Can anyone provide me a sample code asap?

Thanks in advance.