You need to apply for the IEO and fill their built in forms. After you do that, they'll have a look at your project and mail you and you have to deal for the listing.
Most of them don't specify a fee and depends on the deal you make. The better your work on whitepaper, website and tokenomics, better are you chances of getting a cheap deal.
If your preparations are insufficient, popular exchanges would not even respond you back.