Can you ad bones to a character in unity?

i have made a cool character in unity using the basic shapes because i do not have a 3d modeling program, and i am having problems because he doesn't have bones. is there any way i could put bones on my character in unity?

Yes, but it would probably take you a very long time to make your own tools. The thing is, not "having" Blender is almost the same thing as "having" Blender, because it's FOSS.

Here is the documentation to get you started if you really want to code this yourself.