Can I blend pasta and add water to make bread or pizza dough?
Not exactly. Pasta is made from bits of wheat that are not flour or bran - otherwise known as semolina. Assuming that the pasta hasn't gone through very much more than drying as processing, you're going to end up with something fundamentally different from the grade of white flour - whether its type 00, or other kind of white flour. 

You would get a dough, but something fundamentally different from just adding water to regular white flour, and it would likely have a very different taste and texture from regular flour.