Pale copies and two vertical white streaks
I'm afraid that regarding pale copies, you are better off checking your consumables (toner, fusers, etc) and then try talking to Toshiba. However, the vertical white streaks can be caused by excess ink and other contaminants on the inside of the printer. If you open the main door to both the printer and finisher (if fitted) and look at all of the visible runners, feeders and other handling devices, try to see if any of them line up with your vertical streaks on a page. If so, try manually rolling them and cleaning them thoroughly. This might help remove some of the streaking (it did on mine).
Hope this helps,