OK, first the code you posted is the service tag number. For your security and safety please do not post service tag numbers.
Now if I understand correctly when you try to boot the system it asks for a password, correct? That BIOS password (I believe it is from the computer your boss gave to you) can only be obtained either from your boss, if he knows it,or from Dell. And you would have to call Dell tech support and provide proof that you own the system. That might involve having your boss talk to Dell and transfer ownership to you. The details are below.