What tools are the most crucial to have, if you want to start blogging?
I would say, only laptop or PC, for starters.
With a laptop, you can do almost everything for simple blogging activities.
You can write text posts, you can upload pictures from your computer or from the Internet to illustrate the posts.
You don't even have to have camera or microphone.
These are more advanced tools if you want to do some video or audio podcasts.
But if you want to simply share your ideas through text and pictures, you don't need to have any of that.
If you don't own a laptop or PC yet, go local library.
There you can start your blog without any tools.
Let me know if this helps.