You don't grease starters. You may want to grease the bendix on the starter but that means you have to pull the starter and if you are doing that, you will want to replace the starter. I don't know your specific model but experience tells me that your starter is beneath the intake manifold, bolted up to the engine side of the bell housing.
By the time you get the starter off, you will understand that you want to just go ahead and replace it - since it is so damn hard to get to.