Hi, is there any way to get some google adwords credits or i can advertise with google totally free of cost?
A lot of hosting companies offer vouchers to try google adwords for free to new customers when they sign up. If people don't want the voucher they often sell them on, but you need to check the terms and if there is an expiry date before you buy one. Also, you will need to give google your credit card details when you start an account so that they can continue your ads after the voucher has run out, but if you don't want to continue, just stop your ads and they won't charge you anymore.
yes the only way that I know is by checking with your webhosting provider. they sometimes provide a credit just for signing up for webhosting. little note though, I just signed up for adwords and my webhost was suppose to provide me with a $50.00 credit and It has been 5 days and no credit yet. so be careful.
Build your Adwords skills and the ads will pay for themselves. Trying to game Google will only bite you in the rear over the long haul.