Which protections is needed to be bought for a business idea?
I like to sell it to a European citizen (of Course, for starting it in that country) and I am from a non-EU country.
"Business Ideas" cannot be patented, only novel processes that are not deemed wholly abstract.
Thus, if you had a design for a new type of engine, you could seek a patent.
But if you had an idea for a new type of business, such as an app that utilizes the Uber model to utilize ride sharing for delivery services, it would not be patent eligible.