Edit multiple props of many objects at once?

this is a fast one.

I have a svg file imported with the “grid” of a city map made up by curves. I want to extrude them all but unfortunately I can’t make the extrusion all at once for the hundreds of curves I’ve imported. Not only that but I have to manually turn on the Cyclic U checkbox in the Active Spline section in order to make it work all right.

Is there any easy way to make all this changes all at once or am I going to set up some like 600 hundred curves one by one? Unfortunately scripting is out of the game as I’m completely nerd for that stuff.

Thanks in advance