1. You do not need Netflow configured on the router to poll for CBQoS information. However, the CBQoS polling features are only present in our NetFlow product. You can enable CBQoS collection by clicking Manage Sources on the Netflow tab, then click the check box for CBQoS for the relevant node.
2. We currently only support Cisco QoS. What you are asking for is exactly what this feature of the product was built to handle.
3. The easiest place to find all of our documentation is at this page: http://thwack.solarwinds.com/support