Is there something in a debug.log from 2011 that would tell me if there are BTC in an old wallet.dat? I took an old laptop out of storage today because I recalled trying to mine BTC years ago. I remember giving up quickly because, whatever the UI was, it showed that I had mined 0. I'd like to confirm that.
Is there anything in any of these files that would confirm that there's 0 BTC in these? debug.log seems to be the only plaintext file.
Date modified on these files are in the range of 05/2011 ~ 06/2011
/user/AppData/Roaming/Bitcoin
-database/    (9MB)
-.lock        (0KB)
-__db.001    
-__db.002    
-__db.003    
-__db.004    
-__db.005    
-__db.006    
-addr.dat    (18MB)
-blk0001.dat (279MB)
-blkindex.dat(133MB)
-db.log      (0KB)
-debug.log   (3MB)
-wallet.dat  (104KB)
What I would do in this case (the easiest approach):

Copy wallet.dat to a new directory called Bitcoin in %appdata%
Run latest Bitcoin core
Open the console and do
dumpwallet C:\Users\yourusername\Desktop\wallet.txt
Quit Core and delete your new Bitcoin directory. (Don't forget to delete it, it might become larger than 100 MB, to save space)
Save my script with Ctrl + S and name it dumpwallet.html. Open it in your browser. Copy the wallet.txt output here so that only the private keys are listed.
Import wallet to Electrum: &quot;New wallet &gt; Import private keys &gt; Copy from the webpage output&quot;

Then you can see your balance or spend from it.
The tedious approach is to use db_dump of db-util to dump all the transactions and calculate the final balance by yourself. I would not bother doing it this way.