Answer:
My first half means container. Not a lot of people understand my language.
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
You throw me away, I find my way back. Traditionally, I'm wooden with an arch in my back. What am I?
My first is second in line; I send shivers up your spine; not quite shining bright I glitter in the light.
I am an insect. Half of my name is another insect. I am similar to the name of a famous band. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.