I would probably use pesos or maybe Euros
Grams or milligrams would be appropriate units to measure the weight of a five peso coin.
Newtons
A newton - or a millinewton.
The Mexican currency is the Peso.
Milligram: to measure its mass.
The Philippine accountant considers peso as the common unit of measure for all business transactions. There are rare times that the US dollar is also used.
Yes
It means "one peso." The peso is a unit of currency.
centigrams
Monetary unit: Colombian Peso
division
A 100 apaxmai ekaton (assuming this refers to a currency unit) would depend on the current exchange rate, which isn't specified. For converting 100 Philippine pesos to U.S. dollars, as of the latest rates, it would be approximately $1.77 USD (assuming an exchange rate of around 56.50 PHP to 1 USD). There is no 100 peso coin in circulation; the highest denomination is a 100 peso bill.