Firstly, you dont list on CG or CMC, you list a token on an exchange and at the same time propagate it on social media, probably for a longer duration before the token has even been listed.

These sites are aggregator sites, they pull data from exchanges and if a specific coin is making the rounds in that exchange they will automatically list it there. Now if you talk about "paid tags" then I am not aware of any site that allows such services to "list" on their site to increase public awareness but it is an unethical and inorganic mode of marketing, something better to avoid.

Question is incomplete. How many hours it will need to get a price up depends on what price you are talking about, the token's supply and the market capitalization. You need to do some serious homework my friend.