I'll second, third or twenty-seventh Tony Packos as a definite must eat destination.
Even if not at the original location, it's been good at the other places so far for me, that's why I like it - consistently good food. I cannot say the same about other places from expensive to the usual fast food places. Packos has always been good.
The Toledo Museum of Art is well regarded and it now has a neat Glass building. It's worth a look.
http://www.toledomuseum.org/
Glass Pavilion...
http://www.toledomuseum.org/Visit_GlassPavilion.htm
Oh, the Toledo Zoo is also very well regarded as well.
I hear it's actually a darn good Zoo coming from friends/family/random people I've talked to that have been to the supposed better or "good" ones around the US/world. Their site claims it is one of the nations best zoos.
http://www.toledozoo.org/
It'll be warm so it's cool to see the africa whatever exhibit and see a big funky looking supposed bird thing napping next to one of them scary bitey things with teef that swim/lurk in the water. Funky Bird, Bitey Thing...scientific names I'm sure.
There's probably more stuff I'm forgetting...
http://www.toledo.com/index.php
http://www.cedarpoint.com/public/park/rides/coasters/millennium_force/index.cfm
You can even watch a video of that ride, and most of the others too.
Libbey Glass
You may have heard of them...
They have a factory outlet - for those into shopping.
Toledo is The Glass City ya know(maybe you didn't, but you do now).
There's also Put-In-Bay
http://www.putinbay.com/
World's longest bar...
http://www.beerbarrelpib.com/aboutus.htm