Bitcoin Faucets were useful once upon a time, when 10000 BTC still bought you only a single pizza (and even by then, they were starting to die out).
Presently, you will earn next to nothing with faucets - in fact, most faucet websites usually make you earn in DOGE or other coins with much lower values, as the time taken to earn enough BTC to be able to ...
There are no exchanges or services which sell testnet which I know of.
Instead of purchasing directly, mining hardware can be borrowed or rented to directly mine testnet coins. CPU mining is no longer a real possibility for generating over 1 tBTC.
The steps for mining testnet coins would be the following.
Setup Bitcoin testnet full node
Setup pool interface ...