With no money, how do you protect an invention?

The first step will be to file patents. Patent attorneys, like all attorneys, provide “pro bono” service for the benefit of the public.

International Patent: How do you search and find?

Just because a foreign or international patent is not found in an online database, does not mean patent protection does still exist.

Can you patent something that includes other patented parts?

Likely yes. Everything builds on other things. For example, lets say you have an ordinary wooden stool. How many patents could there be?