Hello everyone i was wondering if it is possible to pick up on the casted on end of a scarf and ad more to the end if that is possible?
Sure. You can pick up on any edge. There's a video under the Free Videos tab at the top of the page, Tips, for picking up if you'd like to see an example.
Yes, you can do that, or if you feel like being adventurous, you can pick out the cast on and knit from the live sts. Longtail CO is harder to do this way, but the others not so bad.