Where did Superman get his costume from?

So it's 1978...no Internet. Gotta keep it a secret that you're going to dress as a superhero. You can't sew. What do you do???

Was it ever explained...in the 32 or so movies he appears...where/when he got that ridiculous outfit?! (I mean, seriously...you're a man made of steel and you go with the baby-blue/red/yellow combination?!)

Anyway...I have questions...
* Who designed the Superman logo for him?! (Wouldn't the designer have known who Superman really was then?!)
* When he went to have the shirt portion made, did he provide the iron-able logo patch or did the shirt shop create it for him? Where did the patch come from?!?
* Did Clark Kent ever think to himself..."Why am I designing this suit so I wear my underwear on the outside?!"
* Does Superman really *really* need the cape? Is there any function to it or is it simply for looks?
* If the cape is just for looks, isn't it very superficial of Superman to do this?
* If Clark Kent is such a loner type of hero and doesn't want any attention or accolades...why does he dress in the loudest and most outlandish outfit possible?! Why not just wear all black and try to stay out of the limelight? (Seems weird that a guy who doesn't want to be noticed also dresses in such a colorful and welcoming outfit.)
* How did he get the cape, the boots, and the underwear (that's worn on the outside) to match the color red EXACTLY?! Where those items all from the same company perhaps? Who are their intended customers...drag queens? Those boots are FAAABBBBUUULOUS!
* Did he have to go buy the cape, the boots, the belt, and the outfit separately to throw off the cashier to his identity?! If not, that would be like someone buying mace, rope, and a ski mask at the same time...it's gonna raise some suspicions!
* On a side note...Can you imagine wearing those all-red boots in a public setting?! I'd feel like such a clown, even if I was made of steel! Not sure I would have went with that fashion choice. Clark Kent is no Tommy Hilfiger, that's for sure!
*He wears this outfit nearly every day...does he ever wash it?! Does he have more than one set of the outfit or does he just keep wearing the same one over and over? Does the colors fade after many washes?
* If he never gets cold and can't get injured, why is the suit full-body?! Short sleeves and no cape, plus no red boots, would have been my choice for sure.