In Turkey, we make a camel out of a flea..

it's correct, but in Russia we don't eat noodle from Chinese small box :)

Nono, not a shoe like the one at the picture. A horseshoe.

crayfish is correct !)

This ia just awful jail slang! ) This slang usually use bad educated and dumb people only ! Sometimes use as a joke about dumb people )

Some of these sayings are used in other countries of Europe too, here in Croatia as well, so it's not just the "Russian" thing. :)

Packed like Sardines. Same thing really.

Pants, not undies

Slang too. More exactly that sounds something like this ."To excruciate a little worm to death"

The word used for raisin in this idiom is actually in the diminutive somewhat cutesy form. So if you have something interesting about you, that interesting thing about you is referred to as a baby raisin by this idiom. It is an odd expression, sure, but it is somewhat akin to "the cherry on top" expression in English, which to non-English speakers might seem like a similarly random food item metaphorically used to signify something extraordinary.