" Not to be nasty, but anyone running around with such an old battery in a car LOADED with sensitive electronics should not be surprised at ANYTHING. "

Unfortunately, I am not in a position to replace part's simply because they MAY fail at some point. I do maintain my vehicle as much as is possible, but replacing a part JUST IN CASE isn't realistic for me.

SO, given the age of the battery and the recent indicator light's I was planning on changing the battery in the very near future to see if this help's with these indicator light's. I doubt it will, but I am hopeful it will make a difference.
I understand the coolant level sensor is not hard or expensive to change and anticipate doing that if the battery replacement doesn't rectify the problem. The oil sensor on the other hand sound's more difficult and expensive a project. If anyone has done this or has experience with fixing this, I would love to hear how it went or how difficult/expensive it was.