England issued pound/shilling/pence coins for over 1000 years prior to decimalisation and mint records do not necessarily survive to this day, so it's nearly impossible to give an accurate total.
There is a huge amount of information at the link below.
British pre-decimal coins with no mintmark were minted at the Royal Mint London.
For coins minted in British India (pre-1947), the Bombay minted used a dot. For coins minted in independent India, (post-1947), the Bombay mint uses a small diamond (although proof coins from 1969 to 1995 used a "B").
Value would be between £4- £6 as at October 2010.
No. The window of opportunity for an exchange of British predecimal coins closed many years ago.
Quarters minted after 1965 do not contain silver. Only pre-1965 were struck with a certain percent of sliver.
There was never an Australian pre decimal coin (pre-1966) minted with a Koala on the front, back, or anywhere else.
British decimal Half-Sovereigns are minted annually in most years as a non-circulating Proof FDC gold bullion coin. The last pre-decimal Half-Sovereign minted was issued in 1937 as a non-circulating Proof FDC coin.
There were 240 pre-decimal pennies in a pound.
A pound of silver coins is about $500.00
1992 was the year the new smaller British 10 Pence coin was first issued, 1.413 billion of them. Other than Uncirculated and Proof coin sets, there were no British 10 Pence coins minted from 1982 to 1991 inclusive. The larger pre-1991 10 Pence coins were withdrawn from circulation and demonetised in 1993.
The short and easy answer is, get hold of the "Pocket Guide to Australian Coins and Banknotes" by Greg McDonald, 16th edition or better. Years ago, there was a complicated system of mintmarks including letters which indicated the mint or a dot before or after, above or below certain features on the coin. These days, it is a little simpler but much more difficult to spot if you do not know what to look for. Since 1984 all coins are minted at the Royal Australian Mint (RAM), Canberra. Those pre-1984 coins not minted at the RAM, Canberra, will have a small mark somewhere on the reverse indicating where they were minted. Usually, Non-Circulating Legal Tender (NCLT) coins minted at the Royal Australian Mint Canberra will have a "C" mintmark on them.
Most Australian Penny coins minted at the Melbourne Mint will have no mintmark. It is easier to identify those not minted at the Melbourne Mint. Pennies minted at the Perth Mint from 1938 will have a (.) after the Y in PENNY (PENNY.) or after the last A in AUSTRALIA (AUSTRALIA.) or between the KG above the kangaroos tail (K.G), depending on the year. Some of the 1951 coins were minted at the Royal Mint London and have a small "PL" after the "Y" in PENNY. Some of the 1942 and 1943 coins were minted at the Bombay Mint in India and have a small "I" below the bust of King George VI. The pre-1938 coins (before the kangaroo design) are a lot more difficult. Coins from 1911 and 1913 to 1914 and some 1915 were minted at the Royal Mint London and have no mintmark. Coins from 1912 and some 1915 were minted at the Ralph Heaton Mint in Birmingham and have an "H" mintmark below the scroll. Coins from 1916 to 1918 were minted at the Calcutta Mint in India and have an "I" mintmark below the scroll. From 1919, all coins were minted in Australia. The 1919 and 1920 coins may have a dot (.) above or below the scroll. A dot above the scroll indicates the Sydney Mint, a dot below the scroll indicates the Melbourne Mint. From 1921 to 1936, any Penny without a mintmark may have been minted at any of the Melbourne, Perth or Sydney Mints.