You didn't clarify which country you live in so I will assume you live in Canada.
1996 was the first year that the toonie was released so it might be cool to collect those.
Just a suggestion.
If you're talking about circulation-issue coins with those dates, almost nothing you'll find in change is worth more than its face value. Oceans of coins have been minted in almost all denominations so there's nothing really rare.
About all you might search for would be some of the error coins that occurred; e.g. a 2004 Iowa quarter with an extra leaf on the corn stalk, or some of the proof sets that were accidentally missing the "S" mint mark on one or more coins.
Novelty coins have no numismatic collectible value.
according to collectible coins guide, it is worth about $40.
How much a Harrah's coin is worth depends on the denomination of the coin and the year it was produced. Most coins from Harrah's are only worth their face value, but older coins from this casino may be collectible and more valuable.
Retail values are from $126.00-$270.00 for circulated coins in collectible condition.
To a collector of dimes, yes. To be collectible merely means that there is someone out there who would collect it. If you mean valuable that is different from collectible as not all collectible coins have much value. 1960 dimes are common and worth their melt value in silver about $2 right now. Exceptionally well preserved, or mint state coins will have an added premium worth in the $10 range.
Yes even with the few minor scratches you can still sell them but they wont be worth as much as a perfect silver coin
Copies of coins have no numismatic collectible value. It may have some value if you can find someone that wants it.
Yes, all half-dimes are collectible coins worth much more than face value and often times worth much more than silver content. Value depends on the year, mintmark and condition.
How much ancient coins are worth depends on where they are from and in what condition they are. It also depends on how rare they are.
About £400 - it is a collectible
It depends on what coins they are.
They are bullion coins and are worth only what the metals they are composed of are worth.