#1 is your oldest coin and the only one here not from the 20th century. It's from the Chola dynasty of southern India, from some time in the period AD 1100-1300. The rulers of Sri Lanka made similar looking coins slightly later. Compare your coin with the examples on
these zeno.ru pages.
#2 and #3 have been answered above.
#4 is from the Indian princely state of Hyderabad, 1 anna dated 1362 in the Islamic calendar (= AD 1943).
#5 is also from Hyderabad and is dated the same year as previous; this one is presumably a 2 pai since that is the only bronze type that is holed.
#6: from the Indian princely state of Kutch, dated AD 1920, a 1 trambiyo I believe (can we have a size for this one, please? If it's 15mm, it's a trambiyo, if it's 20mm then it's a dokdo).
#7: from the Indian pricely state of Junagadh, 1 dokdo dated 1966 in the Vikramasamvat calendar (= AD 1909).
#8: back to Hyderabad again, this time a 2 pai dated 1330 (= AD 1912). This one is noteworthy: it's actually the "short 'ain" variety and a little more expensive than the "full 'ain" type the same date; even in this poor condition, probably worth a few dollars.
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