Trying to figure out the what exactly ARIMA Forecast does.

I am trying to predict dataset using ARIMAX forecast.

1.My dataset has ID and other 2 more input fields hence using ARIMAX as no other time series algorithm allows more than 2 input parameters. Am i right with this conclusion??

3.What does these parameters means? it doesn't point out any forecasted value.So how to get the predicted values based on the my data set?? what can we do with this 'Timestamp' & 'Mean'??

4.Is there any other process after creating ARIMAXTRAIN model and ARIMAXFORECAST???

find my sample data set where i need to predict the future 'claims' based on 'Under_Warranty' count

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