SQLAlchemy is licensed under an MIT-style license (see LICENSE). Other incorporated projects may be licensed under different licenses. All licenses allow for non-commercial and commercial use.
python setup.py install
SVN checkouts also inlcude setup.cfg file allowing setuptools to create an svn-tagged build.
Documentation is available in HTML format in the ./doc/ directory.
Information running unit tests is in README.unittests.
good luck !