Lot of coins from Texas

I bought quite a few coins from a Texas estate auction and have no idea what they are,
I did some research but these look nothing like anything I can find. Could someone please help with these?
Thanks

4 ounce silver


1/3 ounce silver


1 ounce gold clad there is a serial number on the back


This one is 1/2 ounce gold

2) 1/3 oz lucky Rabbit Coin Silver Clad

Thanks On the 1/3 oz lucky Rabbit Coin Silver Clad Reply,
I found out that the gold bar is a mass reproduced reprint,