Centesimi Coin

Found some coins..can anyone help me tell what they are?
1.) Its big. On the front there is a picture of a head and says “DEI Gratia 1818 Carolus IIII” on the back it says “Hispan ET IND REX M w/an o over it 8R F M”
2.) On the front it says “Republica Mexicana” and on the back has a symbol w/ ” Libertad” and the border of the coin says “8R C(maybe something after it.can’t read) 1849 RQ(hard to read might not be right..RC or RG maybe) 10 D 20 G^little s” I’m guess its mexican but anything else you can tell me about it?
3.)Its silver on the outside and gold in the middle: Front: Estados Unidos Mexicanos Back: N$ 1 1995
4.) FRONT: Georgivs VI D:G:BR:OMN:REX on the back: 1949 FID DEP SIXPENCE
5.) Front: URRACA Back: Republica De Panama..in the middle: UN CENTESIMO 1967
Are any of these coins worth anything? can you give info on them? are they still in use?
1 the coin is a fantasy item Charles IV (IIII) died in 1808 and Ferdinand VII was king 1808-1821. It is a possible fake from China for they get the history mixed up. The FM for the assayers was last used in 1803.
#2 Is a Mexican 8 reales coin and the mint should be Ca. It should be RG, it sounds in low grade but may be worth around $20.
#3 Is too new to be a collectible and yes it is from Mexico
#4 6 pence from Great Britain made of copper-nickel value .25 in a dealers world coin box.
$5 Coin is to new to be a collectible yet.
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