WINCO HRCP-1309 Rectangular Non-Stick Cake Pan, 13-Inch by 9-Inch, Aluminized Steel

Can you use metal utensils with this?

Are the edges a 90 degree angle? I need to make a cake but all the cake pans are rounded at the corners.

I bought the 13x9, is there a lid I can buy for it?

Does this pan need to be seasoned? I'd guess not as that should be the point of the nonstick coating, but what has your experience been?