When searching in SRDS Media Solutions:
Business Media Advertising Source focuses on Trade Publications
Consumer Media Advertising Source focuses on Consumer Magazines.
In other words, you get a different set of publications depending on whether you search in Business or Consumer.
The best database I found for information on how to advertise in another country was Warc.
If you click on the pdf below, you can see screenshots of some of my searches.
To find advertising rates and audience metrics for websites, use the database SRDS Media Solutions. Check out the pdf below for screenshots of how to navigate to this information.
You may also want to try the website http://www.quantcast.com
Some of these databases may have information that shows which media formats a particular consumer group uses.
Use this reference book to get an idea of how much $ a company spends on advertising. It has current information.