$ 2,500 buys you a new riding lawnmower from Sears. Unless the tractor fairy comes calling, it will be hard to find a "real" tractor in good working condition for the same price.
Maybe you'll find a pretty good vintage tractor for that price, but it's most likely going to require you to spend more time and money keeping it running. Your list of chores calls for safe, reliable and ample power, which are not always the greatest strengths of an old tractor.
If an old tractor is your only option, check out the models Flusher mentioned, but read up on tractors and those models in particular before you start shopping. The more you know, the better your shopping judgement will be.