P-value is also known as probability value and it ranges from 0 to 1. The interpretation of a p-value varies depending on what one is studying.
A confidence interval is a type of statistical interval computed from observed data. A confidence interval consists of a confidence level expressed in percent.
In the model summary of your regression output, you see values of R, R Square, Adjusted R Square, R Square Change and F Change. This post will teach you the right way of interpretating them with good examples.