Money was invented long before the 1700s. The first "money" was just bartering, trading one thing for another thing. Then metal objects were introduced as money around 5000 B.C. The Lydians were the first to make and use coins, around 700 B.C. Please see the related link below for more information.
We used letters.
The stone age!!
Prehistory
Bartering.Trade with Gold & Silver primarily. (still do to this day)
Was it gold or did they just trade things for what they wanted.
They didn't. You can't use something BEFORE it is invented.
benches
Crawling
pickaxes
bikes
Buttons.
Shoelaces were invented long before people bothered to keep records of such things.
Before the refrigerator was invented, people used iceboxes, which were essentially big coolers with a block of ice. Even before that, food was preserved by salting, curing, smoking, drying, and canning.
to communicate between two people
they used ruber bands
just swim
horses or their feet.