New To Coins And I Have A Few Questions

Just recently I received a box of coins that my grandfather had been collecting until he died in the early 90's. I should clarify the type of collecting he did...basically he owned a bar until sometime I think in the 70's and every time he got an interesting coin he would save it.

I plan on keeping these and passing them on through my family but I don't know how I should store these or if it is even worth trying to protect them at this point.

here is a quick rundown of what is in the box:
1 1/2 roll of buffalo head nickels
2 very dirty Indian head pennies
1 1/2 roll of Mercury dimes
about $13 dollars in kennedy's dates ranging from 1970-1979 all in extremely good condition
3 Morgan dollars 1889 and up fairly good condition

there is also an unknown (to me anyways) it is from 1776 on the front it has an Indian standing with a bow type says common wealth on the back it has an eagle with a shield with "cent" on it type on the back is Massachusetts. from research I believe that it is a Ryder 3-E but I can't be sure.

The only other question I have is what is the best way to clean the Indian heads?

Thanks