I have just registered and got 5 tokens which will allow me to enter in the contest.
What will happen if i do not win any more tokens and all my tokens are used.

Hello Tilak, first of all welcome to Photoshopnation! When you finish your tokens and you do not have photocoins to enter contests, you simply buy more photocoins, hover on the "Photocoins" menu and then click on "Get more". Please let me know if you have any more questions