I parboiled zucchini broccoli cauliflower carrots and butternut squash now I want to roast them in the oven what temperature and how long should I roast them since they're partially cooked? 
We don't know how cooked your items are after the par boil.  It also depends on the size of the items.  So, we can't be very precise here.  I would use high heat (400F or higher) because you probably want some color before the items overcook.  As soon as they have some color, test for done-ness.  Zucchini cooks much faster than the other items, so you might add that when the other items are almost complete. 