Ugh, ISA slots, I took a computer engineering course this semester and to my horror the computers they have supplied us with were literally Pentium 133s which were about to be thrown in the garbage.
A TV tuner will use a PCI slot.
Yes, static electricity will damage your motherboard circuits, so it's important to discharge yourself by touching something metal before rummaging around the inside of your computer. Also, magnetic screwdrivers can fry motherboards if they happen to come into contact with them...
Your motherboard doesn't have an AGP slot, I'm just taking a wild guess and suggesting you are using intergrated video. You can check by locating where your monitor is plugged in, that will be your video card.
Intel C2D E6320 / AMD Athlon X2 3800+
Gigabyte 965P DS3 / DFI nF4 Ultra-D
2GB OCZ Gold PC2-6400 / 2GB OCZ Gold PC4000
eVGA 8800GTS 320MB / eVGA 6800GS 256MB
150GB Raptor / 74GB Raptor
2x500GB / 320GB
OCZ GameXStreme 850w / OCZ StealthXStream 600w