HOW DO I CHANGE THE BACKGROUND AND COLOR OF AN IMAGE IN A KEYN OTE PRESENTATION?

You change the colour and levels in: View > Show Adjust Image

Do you want to replace the background or alter it?

Keynote has very limited tools to do this, and is normally achieved in an image editing application: Photoshop, Fotor, ACORN

How do u get too level 6 too change the color for your text me

Click the text box on the slide to select,

Inspector > Format > Text > Font, then click on the colour palette