So I hit a curb with the rear right wheel while making a right turn.

I see scubs on the lower spring support, damaged tire and wheel.

Should I just change all the suspension components, new wheel and get an alignment?

Sorry for your luck broski, I've done this before. Was a while ago and I was SO freaking mad because it was some ridiculous turn and my friend warned me a little late... DOH!

What exactly did you look at/for when you looked at your springs? I'm no mechanic so I'm interested to learn what I should have or still can investigate on my car to see if everything is alright.

Did you hit a damn barrier? I highly doubt you hit anything hard enough to cause enough damage to warrant replacing.

Scrapes on the lower control arm won't hurt anything but you could hit it with some paint if you were super worried about rust.
Just get the wheel rebalanced and check to see if it is bent. Then decide from there.

Now, if you popped the tire, cracked your rim, and then some...then you might need to replace parts.

Sucks bro so sorry to hear that!