I am configuring SNMPv3 using CiscoWorks, but I am confused which OID, Object Type will be configured for Cisco Switch 3750?
LMS is not a general purpose trap manager. Yes, DFM can process certain traps, but sending traps to LMS is still optional.
No, SNMPv3 has no integration with ACS at this time. You do not need to add the SNMPv3 user to ACS. All of the authentication and authorization is done locally on the device.
v1default is a built-in view that gives most of the required access you need. You are free to create your own view if you want.