There are two trolley lines, the Blue for the west side of Old Orchard, and the Yellow for the East Side. The trolley is $1.00 each way, and children under 5 ride free. The Yellow Line has a stop right in front of Imperial Court, on the corner of Milliken and Imperial. You could take this Line to Funtown/Splashtown, or to the Clambake Restaurant.
The Blue Line has a stop that is also very close to Imperial Court at the Corner of Staples and 1st.
To see the map of the Trolley Line and read more, copy and paste this link into your browser.