I'm not sure why we discuss that? Cyclone II is NOT 5V tolerant inputs device. LCD controller needs 5V. So it's outputs will be pulled up to 5V. There is no any doubt, that FPGA will burn, if you connect its inputs to 5V ouputs of LCD controller. There are 3 ways to solve this problem, but using lvc series logic is the best, when signals are more than 8. In fact lvc series is working in systems at 100Mhz, so I don't think, that device, with max. frequency of 2.4 MHz (as Toshiba's LCD controller) will be affected.
So my suggestion is: don't burn your FPGA. Buy a 1$ buffer and be happy.