Why is the rising price of a commodity inflationary, while the rising price of money is disinflationary? Everybody buys oil and everybody borrows money. If the price of oil goes up, we call that inflation and the central bank uses monetary policy (rising interest rates) to reduce inflation. Why is the price of money (i.e. interest rates) different from the price of any other commodity in regards to its impact on inflation? Does not a rising price of oil in itself cool the economy in the same way as a rising price of money?  If we need to spend more to drive our cars, then we can spend less on televisions?
If everybody borrows money, where can you borrow money from? 

In what unit do you denote the price of oil, chocolate, or cows? Well, in units of money. So calling interest rates the price of money doesn't quite make much sense. 

You can think about it as the price of money today in terms of future money though. So an increase in interest rates makes money today more expensive in terms of future money, which is the same thing as making future money cheaper in terms of money today. And if future money gets cheaper, more people might "buy" future money (usually, we call that saving). 

The more future money people buy with money today, the less money they have left for oil, chocolate, and cows. But we already have all the oil, chocolate, and cows around. So that people still buy these things, oil, chocolate, and cows have to get cheaper and the price level for goods and services measured in money today goes down. Less inflation.