Mouse hunt

We have a mouse! At least I hope it's a mouse... The little blighter's been running round in the walls for at least a week, in the kitchen cupboards and everything. It doesn't appear to have gone upstairs (touch wood) and seems to be trapped in the downstairs toilet and the walls now. I got a rat trap and a couple of mousetraps the other day off Ebay, but nothing so far. It's really bumming me out, like I needed another thing to go wrong, but hey! thats life. Kinda making me wish we had a cat now. Maybe I could borrow one?!?!
So far, it's cost me a fortune - well maybe not a fortune, but I had to replace all the cereal and I had some vaccuum bags (the ones for sealing food in) in the cupboard too, and they were pricey. On the off chance i put it's little feet on em, I don't feel good about using them now. Plus the cost of the traps, then Ill have to fill the holes up with expanding foam - gah!
The scrabbling is the worst, it's trying to dig itself a little hole into the lounge from the walls. Oh and it's ripped up some carpet and some lino in the toilet trying to get out! It's LOUD though, this scrabbling. That's what's making me worry that it's a rat, that and the rat I saw scamper past my front door a few months back. A mouse I can just about deal with,but a rat? ugh no. Yukky!

I like mice though, I had a pair of white mice when I was 18. I bought them after I got my sister one for her birthday, and it was jsut so cute! Mind you my friends would freak if I got them out the cage when they were round. The sadist in me thought that was amusing!! I'm not gonna keep the one I catch. I'm gonna take it as far away as I can and let it go. And then pray it doesn't find it's way back! I'll ask my mate if her husband can come round and check for holes in the outside wall too to be on the safe side.

Maybe when the mouse is gone, the ceiling is fixed after the leaky hot water tank thing over Christmas, and I've cleaned everywhere up, life will calm down for a little bit?
No flipping chance!! lol