You could take some small speakers and maybe a little FM antenna and try this stuff out before you buy it... Plug the speakers into the amp and hook the tuner up to the amp (in Tuner, Tape, Aux and such.. but not phono) and make sure you mess with the the balance knob and those eq's.
The wattage output shouldn't matter that much, but it does looke substantial enough to be in that 70-100 watt range. I've seen 50 watt Sansui gear that pushes sound better than many other mfr's 100 watt gear. I'm sure that will push whatever speakers you have quite adequately, assuming it works.
$80 seems like a pretty fair price for a vintage integrated amp and tuner. I'm thinking that if the pair works as advertised, it might go for double or triple that price on ebay, Clean it up, dexoit the knobs and switches, take better pics and give it a good write up and you could make some dough. Old-school amps with analog VU meters from reputable manufacturers seem to be going for a bit of a premium on ebay as of late. And the silver facia on that makes me think its from the late 70's or early 80s. The built-in EQ is actually a really cool feature. My Sansui AU-D77X has that as well, awesome to have built in!
Go on ebay and do separate searches for "JVC integrated amplifier" and "JVC Tuner" and see what they go for there? Maybe somebody there has the specs for you to review? Or you'll find info on other gear from that same producdt line. Surely there's some info out there for you to find.
I did some pecking around ebay and did not find a JVC amp like that one, but I found a tuner with close resemblance... like maybe the one in your pic is a step down from this one as its missing some buttons (probably the output control and the test-tone generator) :
http://cgi.ebay.com/JVC-JT-V77-Tune...|66:4|65:12|39:1|240:1318|301:1|293:1|294:200
Also, you might want to try a search for JVC integrated amplifier on
http://www.audiokarma.org and see what pops up there...
For $80 though, I'd go check to see if it works. And if it looks better in person that it does in the pics and it works, then I'd probably buy it.