Use a block of wood on a jack to hold the engine up so that you can get r & r the engine mount. It helps to have a set of ratcheting box end wrenches. And yes, it's easier to do with the oil filter off but it's not impossible to do it with it on.

To reset the service light, remove the black plastic connectors at the front of the driver's side knee bolster. Reach up behind the left side of the back of the instrument cluster to flip the switch. It will be mounted behind and alongside the clock or large tach, if you have it.