EBIT is Earnings Before Interest and Taxes.  It is an indicator of a company's profitability.  It can be used to compare the profit of companies in different tax environments.

EBIT = Revenue - Operating Expenses (OPEX)

or

EBIT = Net Income + Interest + Taxes

EBIT is usually calculated from the bottom up.  A similar measure is Operating Earnings.

EBITDA is Earnings Before Interest, Taxes, Depreciation and Amortization.  It is a measure of a company's financial performance.  It is used in various Valuation Ratios

EBITDA = Net Profit + Interest + Taxes + Depreciation + Amortization

Enterprise value is the total cost to acquire the entire company.

Enterprise value = Market Cap + Preferred Equity + Non-Controlling interests + Total debt - Cash and equivalents

It's a better measure than Market Cap to use when trying to determine Value because it include things that must be taken on by a purchaser like debt.

Market capitaliztion is the total value of the company's equity.

Market Cap = Share price x Total outstanding shares

OIBDP is Operating Income Before Depreciation.  Similar to and can be used instead of EBITDA and/or Operating Earnings.  It differs from Operating Earnings by including Depreciation and Amortization.

OIBDP = Revenue - COGS - Selling, general and administration costs

Similar to EBIT.  Operating Earnings calculates the earnings of a company adjusting for it's capital structure.  It's a non-GAAP measure and can be calculate slightly different depending on your requirements.  But in general is:

Operating Earnings = Revenue - COGS - Selling, general and administration costs - Depreciation and Amortization