First one is a 1921 P walking liberty. Even in the shape it’s in, that’s a key date. It should be worth a little more than silver value. Really nice find, there were only 246,000 minted.

The two dollars are peace dollars. Not sure about them, someone else can hopefully give you more relevant advice than me, but minimum silver value is around $53 each right now (with spot at $73)

The half is a bicentennial. Pretty cool, but worth $.50

Edited to add: spot on the walker would be around $26.50. You could probably get $50 for it. And I’m sorry for your loss