Suggest me how to pass entries

A) When money borrowed from friend --

Cash or Bank A/c             Dr 100000

    To Loan from Friend (Mr. A)            100000

(Being loan taken from friend)

B) Introducing capital to the new business --

Cash A/c                         Dr      100000

    To Capital A/c

(Being business started with cash)

C) Every time When paying the borrowed money with interest to friend --

Loan from Friend (Mr. A)      Dr.  10000

Interest on loan A/c             Dr.    400 (supposed)

   To Cash or Bank A/c

(Being part payment of loan paid to Mr. A)