1. if someone, while fasting, touches the private parts and kisses a girl (which is not his wife- Intercource is not made), what would happen to Sawm?

At the outset it is important to understand that it is prohibited to touch a non mahram female. Kissing is far more severe than that. Remember you are in the month of ramadaan and it does behove a muslim to be involved in Haraam acts. Just as the rewards are multiplied in this month, the punishments for sins are also multiplied. Therefore make sincere tawbah for your wrongs in this blessed month and stop having any contact with strange women. If you have reached a marriageable age ,you should marry. Marriage will protect you from falling into Haraam relationships and will also protect your chastity and Imaan.

Kissing does not nullify the fast.

Zakaat will be given according to the market price of the share.

and Allah Ta'ala Knows Best

Mufti Ebrahim Desai