you won't get pluto. It's too faint even for bigger scopes.
Go to
www.skymaps.com and download the current chart for the southern hemisphere. On page 2 there is a list of objects sorted by instrument, i.e. naked eye, binos, telescope. The naked eye and bino objects will look great in the 80mm, as will some of the telescope ones, except for the very faint ones which might need more aperture. Still there's lots there to get you started.
If you get well away from city lights (100km or more) and towns (20km or more) you will be able to see heaps more: easily all the objects on the above chart and more. For a more comprehensive but not overwhelming guide, check out the Southern Sky Guide. Scope shops have it for around $25. Great investment (as is a planisphere).