How i Extract a color from an object in my background. so i can use it on the word text?

make text layer and write what do you want

then create layer who is upper your text layer

then go image apply image

then press on aplied image layer with right mouse button and click create clipping mask. then take move tool and move this layer until you got your needed color

Eyedropper tool, or ctrl + click on the spot

Yes! Except make sure if your sig is in layer's your on the right layer, and I believe it is alt+click