The euro against the dollar exchange rate is 1.0878, meaning that if you were to go to Europe right now, you would need to exchange 1.0878 dollars to get one euro.
In the aussie new zealand currency pair, the ones represent the ones decimal, the tens represent the tens decimal, the ones hundreds represent the ones hundreds decimal, and the zero represents the ones thousands decimal.
If you have a thousand dollar account and fifty to one leverage, the correct way of using that leverage is to decide on a risk management plan, such as risking between 1 and 2 of your total account balance per trade.
As a beginner, it's expected to lose most of the time, so it's okay to lose, but if you have your entire account balance of $1,000, it gives you $50,000 in buying power.