Not used CFX before, but can you not define boundary conditions in CFX? If not then I advise gambit and set your boundary conditions that way, (inlet, outlet, walls, etc) then import into Fluent.
For the reference values, you will have to set the area, length and depth. I believe the other values will be defined when you chose where to compute from... So do not change any of the others.
If you are new to Fluent then I would recommend you follow through the tutorials made available by Cornell University.https://confluence.cornell.edu/display/ ... ng+Modules
These are a great help and will introduce you to many of the common functions you will need to use for most simulations.
Likewise, what is your knowledge of the problem you are trying to simulate like? A must have requirement before any of this would be a strong background knowledge of fluid dynamics/aerodynamics and the problem, otherwise you are going to be producing some very pretty pictures with very little meaning. I suppose being an final year student you should have sufficient knowledge to be able to read and describe the flow patterns you see.
Is it a 2d or 3d case? I would assume 3d if you have used CFX to mesh?