Resize text by going to Edit > Transform > Scale. Change the colour by going into the text layer's blending options and ticking Color Overlay, then just click the colour and choose one that you want. Hope it helps.
Resize: Just select the text and change the pts. Like 24pts or 18pts. Color: Select the text, and select a color at your Swatches
For GR? Ok then, highlight text and click the color drop down box, then just pick one of them. There's a more advanced way by using colour codes. Code: text