How can i invest more money in my company than authorized share capital

Hello, I am thinking to register my company as private limited in India with Authorised share capital as Rs100000 only. In future I will be putting up more money as per company requirements for employee salary, stationary, furniture and equipments. The additional money will be coming at any time in the year. How can we show the future money transactions in balance sheet? What all formalities needed to add more investment in my company? Is it true that we can invest more capital only for capital expenditure like building etc.? Please help. Thank you.