I am afraid that what you are hoping Elements to do is a dream.
I don't know of any other photography editing software that can do that.
Changing the color of an object is possible if you have made a selection of this object. There are tools in Elements to help you select the object, but you have to finetune the selection manually for each picture.
Generally, the object has to be selected individually for different pictures. That would be difficult to do automatically. First, identifying the object in various pictures, then selecting it.
Changing the color of the object is also possible, but it's not always obvious nor easy. If you have to adjust the color on different pictures with something changing in the lighting or position of the object, you'll need to do it individually.
I suggest to describe your job more precisely to get advice about possible workflows.