I have done some research and if I am not wrong, it takes about 10 mins to do a block.
At an average of 10 minutes a new block is mined. But nowadays one needs special hardware to mine a new block. Usually many such hardware devices.
The miner receives some coins for that job.
All the blocks already mined can be downloaded for free by anybody connected to the network.
So, base of any who can share information on this, is there something I can do with blocks? are blocks worth anything?
If I understand your problem right, then the answer is "no, sorry".
If you indeed mined blocks, your wallet should have coins in it. That's the one to recover.
But on that transfer, I lost the key, or password.
If you still have that HDD and no other things (or at least not much) was written onto it, you may have a chance to recover your keys.
There are services that can do that. But you have to know a bit more than that, at least you have to know whether you indeed had coins in a wallet on that HDD.