In a discussion with my friend he said Islam allow man to ask money(dowry) to marry a girl. Is any thing like that.Please give me suggestions.
In Islam it is the groom who have to give the dower(Mahr in arabic) to bride.
"And give the women [upon marriage] their [bridal] gifts graciously. But if they give up willingly to you anything of it, then take it in satisfaction and ease." 4:4 source :http://quran.com/4/4
Giving of dower and acceptance of it is important part of marriage, without giving of dower, marriage would be invalid. So if groom demands from the bride more than what is given as dower, then in effect it is like he is not giving the dower.
As mentioned in the verse, after dower is given, if bride willingly give back from the dower, then there is nothing wrong in receiving it.