Easy Framecounter

Go to My Documents > Maya > 8.5 > scripts > userSetup.mel
Open userSetup.mel (if you have no userSetup.mel, create it) with a text editor like notepad.
Add these lines :
Code:

//ADDING FRAME COUNTER
headsUpDisplay
-section 5
-block 1
-blockSize "small"
-dfs "large"
-ao 1
-l frame
-command "currentTime -q"
-atr
HUDFrameCount;

Save your userSetup.mel.
Start Maya, you can see the counter on the down left corner.

Free bus obj model is here
http://thefree3dmodels.com/stuff/vehicles/bus/13-1-0-722