I have a Bachmann Big Haulers Royal Blue G Scale Complete Ready-to-run Train Set (details below) that I am struggling to get running.  Instructions were lost...  I'm just just getting back into this after many years away.

I'd greatly appreciate any troubleshooting tips, checklists to walk through or expertise from fellow train enthusiasts on this site. 

Thank you.
Joe

—————
Baltimore & Ohio (B &O) 4-6-0 Steam Locomotive with Tender
G scale
Realistic electronic steam & locomotive sounds
Operating headlight
Lighted Combine Car with Operating Doors
Observation Car with lighted interior and Drumhead
20 running feet of steel alloy track
UL Approved Power Pack
"G" Full Baggage Car (B & O Royal Blue)
"G" Lighted Coach Car (B & O Royal Blue)