You're serious? You own a Mercer Raceabout?
This is really the first American sports car. It is a historically significant, rare and valuable car.
I would suggets that you seek the services of a professional antique auto evaluator (in fact, I'd hire two seperate people, just to be sure). It will be well worth the money. The curator of an automotive museum may be able to help you.
Meanwhile, keep the car in a safe and secure place.
Due to the rarity and value of this car, I would not drive the car on public roads, even if it runs....it's not worth the risk of damaging it.
The Mercer Raceabout was built in Mercer Country, New Jersey, USA. I used to live right down the street from the old Mercer factory. The owners of the company were the Roeblings, who were very well known for building the Brooklyn Bridge in New York City (among many other things). The overall design is considered to be sturdy yet lightweight (in terms of "Brass Era" cars). Many were fitted with a monocle windshield for road use.
Do not paint or change anything on the car...cleaning up that "faded number" (or anything else) may actually reduce it's value.
Her is a page with some more info:
https://www.chandlerwheels.com/autos/auto_pages/1911_mercer_raceabout.html
Let me repeat for emphasis....even if it's missing a few pieces here and there and even if it does not run, the car is very rare and
valuable!. Don't let anyone tell you otherwise!
G'luck!