Open your profile from the main menu, click the rocket icon and you'll see a VIP-status purchase screen. On this screen you'll see different options of VIP-status Subscriptions, as well as a list of bonuses that VIP-status gives.
You can purchase coins and likes on the fill-up screen. Click the "Fill up" button on the lefthand menu and select a product that interests you.

Purchases can be made through the App Store.
In the Topface app, on the Purchases page, choose a product that interests you. To complete a purchase, enter your App Store login and password, then follow the instructions.

If you don't have a bank card, you still can make purchases in our app with the help of Yandex.Money. You can use it if you don't want to share your credit/debit card info - get an iTunes PIN (costing from 500 to 15k rubles) and follow the instructions you see onscreen. More information can be found here: https://money.yandex.ru/games/shop.xml?scid=5503&from=itrcd&ncrnd=3771

When using the above link you'll see a "Buy Code" button. Click on it and complete your purchase following the instructions there.