Can I get free karma from friends to increase my status? And what is the usage
Nah, that would be karma abusing if you don't deserve karma on any post and you ask your friend to give you karma, then you would be convicted of karma abusing. First of all, your friend has to be a senior member to give karma to you, and if he proves guilty, then he can lose his power to give karma.
Therefore, I suggest you avoid this quick method to increase status, and if by status you mean rank, then keep in mind that you don't need karma to increase your rank as we need merits on BTT, we only need activity and to make posts here to get ranked. But that's not too easy as well, but it's easy in comparison to BTT.