These kinds of English tests are required when you are willing to continue your study abroad.
So if you are interested in registering yourselves for the test, make sure that you have made enough preparation, cause you have to spend money quite a lot--I mean, it would be a great loss, if you simply join the test without preparation, then....( no wonde)get failed.
It's not only about making yourselves learning English in tight schedule before "the day", but also about knowing THE STRUCTURE of the test. You should realize that those two tests have their own characteristics. So, actually this is also the key to pass the test successfully, besides your English competency (indeed).
But no worries...
in this era, you don't have to spend much money for expensive course--especially if your English is not "too bad". You can use the advantage of the internet. There are lots of free websites that will be helpful in giving you samples and also simulations (online), either TOEFL or IELTS.
So please, just take your time to browse. However, you should remember, you will need intensive practice, so make sure to manage your schedule for that need.