> - Vdd which is the regular power supply
> - Vss this pin is to be tied to the GROUND
> - Vcc : (Pin 1) CONNECT TO WHAT VOLTAGE? (I only need the driver ability
> of this
> chip)
>
> Shall I tie Vcc to +5V or to GND, and what is the meaning of Vcc?

What they're telling you is that there are two sections of the chip, one is
CMOS logic, and the other is TTL.   The cmos section wants to be powered
from the same logic supply used by the thing that drives it. This makes it's
logic thresholds correct.
The other part is something you'll have to answer, but I'll say it wants VCC
to connect to whatever this chip will be driving, so that it's outputs are
properly scaled.

Multi-supply chips, and level translation chips, are a little more
interesting, that's all.