Hello, Dee Dee -
Apparently, the Mickey Mouse ride-on train and tracks, seems to have been manufactured by Kiddieland International Ltd. (in Hong Kong.)
I have not found instructions for the Mickey Mouse ride-on train, other than it uses 6 D batteries. I hope you have already checked the batteries and inserted new ones.
You can send an email to the Kiddieland International headquarters and ask about the availability of instructions for the ride-on toy:
The traditional mail address for Kiddieland International in the USA is:
18 Doctor's Hill Drive
Scituate, MA 02066
According to Better Business Bureau information, this is the phone number for the Scituate, MA address: