It's been a long time since I studied monetary theory....
Not only is Shake correct, I suspect you are confusing "money" with "currency", too.
I don't know if this will help, but I found what I consider to be a good beginning on understanding money at
this wiki site. Not that I'm a big fan of wikipedia, as I've found some egregious mistakes therein, but it did look to have some fairly cogent explanations.
First, I suspect what you are referring to as "money" is US currency....what I would call M0 (that's M-zero). It's the amount of printed money actually circulating. The thing is, most money has no physical form at all...it's deposits in banks. That means it's just a number on their books; nowadays an electronic input attached to depositers names.
The national debt is what the national government has borrowed, above and beyond revenues taken in from taxes, tariffs and fees, to pay it's obligations. Usually, that debt is represented in the form of bonds sold on the open market, which can be purchased by anyone, including foreign investors.
I'm not so sure that oil transactions being paid out in euros, rather than dollars, is going to significantly affect the economic or political position of the United States. It would merely change the "standard" of exchange for some buyers and sellers, from dollars to euros. Since most currencies are exchanged on an open market, dollars can be exchanged for euros and vice versa. It would be a blow to the US currency's "reputation", but I don't think it would have much affect in terms of inflation or deflation.
Inflation is when the money supply expands so that, relative to the products available to purchase, buyers have more money to spend. "Too many dollars chasing too few goods." This happened in the US during the 60s and 70s as a result of the expansion of the military industrial complex (with Vietnam and nuclear proliferation) and massive entitlements to large sectors of the American economy. Result: Relatively little production of goods or services, compared to the growth in the money supply....inflation.
Deflation occurs when supply of goods exceeds demand and the money supply is constricted in an attempt to reach a balance; "too many goods, and not enough money." If deflation occurs too rapidly, it may spiral out of control in a market collapse and lead to a recession, or depression.
I note that in many of the sites, there was discussion as to whether credit could be considered money. I learned that extension of credit, rather than actually printing more currency, is the largest source of the increase in the money supply, at the M4 level. Control of the money supply in the US is done by the Federal Reserve determining how banks may extend additional credit to commercial and personal creditors.
By the way, there are markets in money for money, complete with futures trading, thanks to the variance in changes in money supply and expectations of demand worldwide.