Money is an asset used in a division of labor society as a medium for indirect exchange.
The money price of a good/service is what it is exchanged for in terms of money.
“Intellectual freedom cannot exist without political freedom; political freedom cannot exist without economic freedom; a free mind and a free market are corollaries.” — Ayn Rand
A free-market is a market, where individuals (or groups of individuals) compete against each other to trade goods and services with other individuals (groups), under a legal system based on the protection of individual rights (capitalism), free from the coercive effects of the initiation of physical force (and its corollary, fraud).
Observe that the competition among buyers and the competition among sellers leads to cooperation between buyers and sellers, as the buyer and seller exchange values for mutual gain and mutual benefit (else no trade would take place).
 Ayn Rand “For the New Intellectual” 25
Market competition between sellers for buyer’s money, and between buyers for seller’s goods/services results in cooperation between buyers and sellers when a trade is made.
A business (enterprise) is an organization that creates products/services to sell on the market with the goal of making a profit for its owners.
A business makes a profit/loss when its revenues (sales) are more/less than its costs (expenses).
The profits from the business can be either spent on consumption or saved and reinvested. Savings is wealth that is not consumed.
Capital is savings from production reinvested in an industry to produce wealth.
Capital goods are those goods used to increase the productivity of labor.
A capitalist (or entrepreneur) is an individual who invests (and risks) capital in a business concern in the hopes of earning a profit in the future.
The capital may be from their personal savings, or obtained from others through a financier.