Paid up capital

You can show it in cash and you can issue share certificates as for now and at the end of year you can show that the shareholders have paid in cash

Can some amount deposit in bank..lets say 50,000 n bal 450,000 paid to purchase machinery n all ?

but paid up capital means the amount which is received against purchase of shares... how can you buy machinery from that capital ?
moreover if you you are transferring 50000 in bank account then keep 50000 as your paid up and rest of the amount you can show in form that you have purchased machinery before incorporation

actually company incorporated before it came to me for AM
as You said I will show shareholder paid 500,000 in cash
but can company use it to purchase machinery...that is my question
as per accounting view

Yes you can purchase the machinery on credit basis and show the vendor account under the head Other long term liabilities or long term borrowings( based on your credit terms) in the balance sheet. And there is no need decreasing any share capital.