The list is too considerable to address in this forum. I suggest you find a book on coins and look them up.
1943 silver pennies
A rare date for wheat pennies would be 1909 S VDB.
No, the 1951 Lincoln cent is not rare.
Not really.
They were minted at the Philidelphi(no mint-mark), Denver(D) mints. These pennies are not rare.
A rare date would be 1909-S VDB.
They're not all that rare. If dirty and corroded, about 5 cents each. Really nice uncirculated examples can be bought from a dealer for $1 or $2.
Uh, the word "everyday" means "ordinary or commonplace" so something that's commonplace can't be rare. If you're asking what are rare dates for Lincoln pennies please see the Related Question for more details.
NO, cleaning them will probably reduce their value
Please see Related Answers
Maybe 5-10 cents. They are not really rare at all so they don't have too much value with them.
All of them were supposed to be made of steel, however there were a few copper coins accidentally struck that year. Its extremely rare to come across copper pennies from that year.