Hi Vinay,
please check the System Requirements Guide for your specific wM Version:
http://techcommunity.softwareag.com/ecosystem/communities/public/_communities/documentation
There Adapters available for SAP and DB (JDBC).
For most of your requirements IS will do the trick.
From older experiences I would suggest to connect the Siebel systems via WebServices.
For EDI/B2B you will need to install TN on top of the IS.
MWS is used as a frontend for monitoring and administration of most of the components.
Regarding Broker:
As Broker 9.6 is the last version (still supported though) I would suggest using Universal Messaging instead.
This one supports Pub/Sub meanwhile.
Regarding SAP:
You will need to download SAP JCo 3 API from SAP Marketplace for you platform.
Ask the SAP-Team if they can provide you with an appropriate user or if they can download the API for you.
Regards,
Holger
#webMethods#Integration-Server-and-ESB