I am a member of ancestry.uk which has the census for 1851, 1861, 1871, 1891 & 1901 (complete with multiple mistranscriptions) and many English and Welsh bmd records.
I do not know if .com and .uk cover the same ground.
I also have the burial index and Memorial inscriptions for Rushen, which is where my people were from. However Brian Lawson has a complete burials index online.
Also I think that the IOM History Society in Peel has some record, but check when it is open as I went on a day it was closed.
If you do not have a car, there is a daily bus from Port St. Mary to Peel, which is fun.