would it be necessary for me to buy an ASIC device in order to use it... These things are kinda costly for me.. Also could you tell me about some cheap ASIC devices
Yes, you need ASICs to mine. Mining on a graphics card takes several million years to mine one coin.
There are two types of cheap ASIC devices.
Cheap per device: These often cost only 10 USD. But they only do 1 or 2 GH/s which means that they are extremely expensive per GH/s. You would be lucky to earn back 10% of the price of the device.
Cheap per GH/s: These are more expensive devices. But they are cheap per GH/s and can make a profit. Have a look at Antminer S7 plus power supply at bitmaintech.com - that's not a cheap machine but you can calculate the price per GH/s and use it as a base for comparison. Have a look at ebay and similar places for older Antminer S-models, kncminer, spondoolies, etc. Compare to the GH/s price of the S7. If a machine doesn't come with a power supply then always factor that into the GH/s price.