The value of this coin is very minimal unless it is considered in mint state which means never handled. Otherwise its value is less than one dollar in good condition.
Not much; most pennies have more historical value than monetary. It's worth about $0.05 to a collector, more if it's in mint shape, or has wheat on the back.
If it is minted with a D on it, there were only 100 made in a test and they were made of a different material. The last one sold at auction for like 100,000 I think. If it has got no D on it, it is worth about 3 cents.
A 1945 penny has some value but not much between $. 25 and $5. 00 and $ 5. 00 is very high. You can sometimes raise the value by having it certified this will help you sell it on a omline auction such as ebay to. The longer you save the greater the chances that it may go up in value.