I believe this is redwood siding.

https://redwood.wiki/customer-creations/2015/04/29/redwood-siding/

Appropriate finishes for redwood siding include penetrating oil-based stains that offer UV protection and allow the wood to breathe, or film-forming paints and sealers for maximum protection. Leaving the wood unfinished is also an option, though it will weather to a silvery-gray color. Penetrating oil-based finishes

• What they are: These products soak into the wood's fibers to provide moisture resistance while allowing the wood to breathe.
• Why they are good for redwood: They are popular on the West Coast, provide a more natural look than film-forming finishes, and are easier to reapply over time because they don't chip or peel.
• What to look for: Choose an oil-based stain that includes a mildewcide and has UV protection to prevent the wood from turning dark and to help it keep its color.
• Examples: Armstrong Clark and Penofin are frequently recommended options.

Leaving the wood unfinished

• What it is: Allowing the redwood to weather naturally without any applied finish.
• Why it is good for redwood: Redwood is naturally resistant to rot and insects, so it can last a long time even when left unfinished.
• What to expect: The wood will turn a silvery-gray color as it ages, which many people find appealing.

Since this is the outside of your home, and that siding in the entryway looks similar to the finish on the decks, I might consider leaving it as is.

Not sure why the original owners thought all this bump outs on the house were desirable. Simpler might be better.

I totally agree- but one project at a time for us. The house has so much potential. I really appreciate your help. Thank you.

Better pics will get better help those make no sense

It looks like some kind of shiplap.