Coin 1: Great Britain penny 1919. There are three mintmark-varieties for this date: no mintmark, H and KN. I believe the marks are in the exergue, on one side of the date or the other. The CV's for Fine are: 1919 50¢, 1919H 1.25, 1919KN $5.00.
Coin 2: Sorry, that one's too far gone. To me the portrait looks more like George Washington than anyone else - I reckon it's a really battered quarter!

Coin 3: an ancient silver tetradrachm (also known as a shekel) of Tyre, Phoenicia. They're listed in Sear's Greek catalogue as S#5918 to 5920; CV is £100 to £120. Popularly sold as "Thirty pieces of silver" coins. Also quite frequently copied; I can't be definite, but that one looks a bit "cast" to me.
Coin 4: Another coin popular with both collectors and copiers: Roman Empire, silver denarius of Tiberius - the so-called "tribute penny". Number in Millenium Sear is S#1763; CV is much higher than it ought to be for a coin so common: $280. Your one looks a bit too shiny - it's either been seriously polished or it's a modern pewter copy.
Coin 5: Can't make that one out at all. To generalize a bit, it's not Roman: no portrait.
Coin 6: Mexico 50 centavos 1959, KM# 450, CV 50¢ in EF.
Coin 7: South Africa 2 rand 1989, KM#139, CV $2 in Unc, face value for circ. One rand is worth about 15¢ at the moment.
Coin 8: Germany (Federal, or West) 5 deutschemarks 1975, D mintmark. Sadly, 1974 was the last year the circulating 5 mark coins were struck in silver (Germany was one of the last countries to drop silver from circulation), so 1975's are very common. KM 140.1, CV $3.30 in Unc.
Coin 9: Great Britain halfpenny 1942. For some reason, I seem to be seeing a lot of battered, burned or corroded British war-period halfpennies lately. Might have something to do with the Blitz? KM# 844, CV 10¢ in Fine.
Coin 10: Yugoslavia 1 dinar 1974, KM# 59, CV 10¢ in VF, 35¢ in Unc.
(Edited for thilly thpelling mithtakes.

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Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis