For most (MOST) cases, you will need an adapter of some sort, to squeeze a 2.5" SSD into a 3.5" drive bay. You don't need to pay 20 bucks for it though. This would do fine:http://www.newegg.com/Product/Product.aspx?Item=N82E16817994140
The SSD should use standard SATA data cable and standard SATA power cable. So the cables you need *should* have come with the power supply and motherboard, if both are compatible with an SATA SSD.
On a side note, it's terrible that almost none of the current cases include 2.5" drive bays...
(getting ready for my next mid-tower build with three 2.5" hard drives...)