are they comprise of paper money or coins?
There was issue of paper money between certain period while only coins circulated in the archipelago.
Currencies of Puerto Rico
 issue of paper money between 1813 and 1815, brought the production of banknotes to a halt, while only coins circulated in the archipelago.
what type of money do they use in puerto rico Foreign and provincial currencies
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Currencies of Puerto Rico [SEP] Reemergence of paper money
The negative perception created by the issue of paper money between 1813 and 1815, brought the production of banknotes to a halt, while only coins circulated in the archipelago. In 1865, the Spanish Civil Code was imposed in Puerto Rico. Meanwhile, the "Caja de Ahorros" was founded in San Juan, a small bank, which provided an annual interest of up to 6% to its subscribers. The institution was bankrupted in 1879, but its business model was followed by other banks founded in the southern region of Puerto Rico. The "Caja de Ahorros de Ponce" (lit. "Ponce Savings Bank") was founded in 1873 and continued in business until 1879.