How Well Do You Know Your World Coins?

bart, both are correct.
Arkie, indeed - 13 is one of the small silver coins from the Russian Empire.
YNumismetals Collector, thanks!

I guess more hints may be needed:
00 has the currency name in Latin. Also, the face value is spelled out in Latin. This country also used Roman dates (MDCCC...etc. ), though not on this particular coin.
While 13 is Russia, the ones nearby are from countries that soon become Russia's enemies.
43 has a face value of 100.
58 has been one of my favorite coins even though I don't remember it circulating. All I do remember are the brass ones which replaced this type.
74 has a big cross above the date.
75 is from a country which name, as inscribed on the coins, in their own language, consists of two words. The second one begins with "NEP". Later, they dropped the "NEP".
76 is a common coin, I am quite surprised it wasn't identified yet. Would it help if I added that circulation strikes were made until 1996?
87 is steel, this particular coin has a face value of 50, the lowest face value of the set was 2 and there was no 1.
The name of the currency of 96 is exactly the same as a kind of tree in Polish. I suspect it may mean something similar in the language of the country that issues these coins given all the leaves in the background.

All three correct!

And 43 could be Romania 100 lei
76 is, I believe, Germany 5 or 10 pfennig

All correct. For the record,

january1may,
58 is Poland (this one was a 2 zlote)
96 is Croatia (this one was a 50 lipa)

bart,
43 is Romania 100 lei
76 is West Germany (this one was a 10 pfennig)

Joseph7420,
87 is Bolivia 50 centavos.

Currently identified 69/100.
Missing: 01, 05-06, 12, 14, 20, 22, 25, 28, 31, 33, 36, 42, 47, 60-61, 67-68, 78-84, 89-90, 92-93, 95, 99.

Let's get the easy ones out of the way. I am somewhat surprised they haven't been identified yet:
14 has no text at all on the obverse except for two tiny letters, the letters vary from coin to coin, but both of them are always the same on the same coin.
31 is silver and within the same decade was replaced by a non-silver many-sided coin.
36 comes from a country which hosted a major sports event that year.
80 is the last date for that type. The first time this reverse was used was 1948 but there was a different head on the obverse of that coin compared to the later ones, including the 1980.

And 14 is Germany (German empire) 1 mark, while 12 is a 2 coronae from Austria.

bart, 33 is not from the Soviet Union - but all others (06, 12, 14, 31, 36) are correct!

I am positively surprised by the fact 06 wasn't one of the last to be guessed, even regardless of the fact that there was a hint. If you identified that one, there should be no problems with most of the others!

Currently missing:
01, 05, 20, 22, 25, 28, 33, 42, 47, 60-61, 67-68, 78-84, 89-90, 92-93, 95, 99.

Correct