Ok, it sounds like you are pretty new to the 3d world.
.blend is Blender's own format. It is mostly read only by blender, although there are several programs that can import it.
In order to get a model from blender to dbpro, you have to export it to a format that dbpro recognizes, such as .x and sometimes .3ds. In blender, in the file menu, there is an option called export. Choose this, and choose direct x(.x). It will ask you a couple things about how it should export it, and then you write the file name and click export. The created file is the file that dbpro can use, or anything that uses .x.
As for animation, anim8r has poor animation, which cannot be loaded in dbpro anyway. I would reccomend characterfx, fragmotion, or milkshape for the animation.
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