Does all furniture come with tools to build or do i need to use my own tools?

Usually common sense is all you need, but a hammer and screwdriver might be needed.

Mostly all time.

Some yet its good to have your own just in case..

You will be ok, mainly, with a hammer a s screwdriver

Mostly

Usually they come with it... Other than a simple hammer, screwdriver,...

You need to have basic tools.