oppa Gangnam Style
photoshop illustrator
I don't know for this term, generally You can change any Layer style in Photoshop except if this mean style which is created (style consist from several Layer effects) and ready to apply with one click.
Cascading Style Sheet
Layer > Layer Style.
Baroque
From Layer > Layer Style > Drop Shadow.
black and white photos are in style now and is effective
You can access styles from STYLES panel or from Layer Style dialog (fx at bottom of LAYERS panel).
I would recommend Adobe Photoshop or Adobe Illustrator.
One of the best ways to design images in Photoshop is to look at tutorial on places such as deviantART or YouTube. From there, one should just keep practicing to develop their own style of art.
Um why would you want to copy a style you don't comprehend? Well here's your answer: PHOTOSHOP and no more