1.In the transaction, when the receiver receives Bitcoin and how the receiver knows that he/she receives Bitcoin
The transaction shows up in the block-chain. The receiver has to monitor the block-chain, looking for transactions that pay them money. This is one of the functions of wallet software.
2. What will happen if there are no Minors in the network.
No miners means no more transactions will be added to the block-chain, so Bitcoin would become a dead currency until/unless a new miner started again.