The little metal bracket are the spring clips. As far as I know yes you need them.
Are you sure you have the correct pads ?
Who did you buy them from, one of the Mike's on here ? (m sprank or Mike at www.AZPinstalls.com
When it comes to most items, those are the guy's you should be buying from. There are afew other guy's on here you can trust too.
I see your new, just poke around in the forums, you'll come across them. You should buy from these guy's because they know these cars, and more important, help out here for free and will sell you the correct part the frist time and stand behind what they sell.
188k, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
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