The Release Notes contain the user/password information which we have set on CIMC as admin/password. They Release Notes can be downloaded from our Knowledge Base at http://developer.cisco.com/group/ucse/docs . I've attached them here as well.
Regarding plugging in a keyboard/monitor, the UCS-E doublewide board that you have has a VGA port as well as USB ports on which you can plug in a monitor/mouse/keyboard.
In terms of booting from the USB flash drive, I'm assuming here that you mean you'd like to install the OS from the USB? If so, yes this feature is supported, but you need to do the initial configuration via the KVM provided in the CIMC GUI interface.
Thanks,
Brett