You can always get help at a SnB, but be prepared to just ask advice and do it yourself.
Turns out some folks think a SnB is where other folks do your sewing for you. We disabuse them of that notion pretty fast, usually by pushing them towards a sewing machine. (grins!)

Absolutely. Look at patterns. You won't find everything you need, but you will find some of the pieces.
Say the pants. Those should be really easy to find. It's just a loose pant with a band of color added at the bottom.
The panels are just modified table runners (okay, panels of fabric with hemmed edges.) The fewer indented corners, the less you'll curse while sewing.
The shoulder bit and the helmet might stump you, but maybe not. Maybe you could build/sew them out of pleather so they can support themselves. Or headliner fabric (that fabric with foam backing they cover the insides of car roofs with. It's available at JoAnne's fabric - and interestingly, velcro sticks to it like crazy!) Headliner'd probably pick up a lot of dust...
Capes are dead easy (and there'll be patterns for 'em if you want one.)

Get thee to a sewing store and start perusing the pattern books!
Do you have the fabric already?

(Don't know when the next SnB is. Our house is in a muddle at the mo' with furniture everywhere. Maybe in a couple of weeks?)