I don't know anything about that cartoon, lol. What relation are Tom and the mouse?

Lol, they are rivals (typical cat and mouse relationship) Tom is always trying to kill Jerry but Jerry always getting one up on him, a bit like the roadrunner.
Lol, I'm appalled that you haven't seen it.

*always gets

I have many things to learn ;-)

Lol, it's been a long time since I've watched it. Must have missed that episode. XD