Nowadays it's not that easy to get decent traffic to faucet. First of all I suggest you to get paid hosting and domain - it's not that expensive and it's very important thing if you want to make your faucet more popular. It will look more solid and also free hosting have many limits which is big downside. Also, some best ad networks don't accept free hosted websites.
Try contacting owners of faucet lists to add your faucet - it can be one of main sources of traffic.
There is one not popular option - you always can use ad networks to promote your website. But you need some spare money for it.
start with a good domain name preferably .com because when people see that they will take you as serious in your line of business and get good paid web hosting for it, for we know that free web hosting has limitations on traffic.
I don't think that .com is neccessary. Other popular domains like .net, .io, .org, .co.uk will be good for faucet. Even these *free* domains like .ml or .tk isn't that bad, it only doesn't looks solid.