How much would it cost to open your own coffee shop?

I would say about 5 dollars.

Bit of a "how long is a piece of string" question. To get a reasonably accurate answer you may need to do some research. You'll need to see how much a shop costs to rent/buy in the area you want (and make sure that area actually has enough traffic). Then you'll need to get prices for all the equipment (see what other coffee shops have and price it up). Then you'll need to look at what all the overhead costs are going to be.

I would cost around 40,000 dollars to open a book and coffee shop here in my country.

In my country it costs 80K USD for opening any type of shop. coffee shop and other stuff would take around that.