'88 honda civic

Depends what you're looking for. 

You could run your front and optional rear speakers right off the deck, keep the lows filtered out and then just have one mono block to run one or two subs.  I did this in my 89 si and it sounded really good. I ran a stereo amp putting out about 400W.  The car is small, you get a nice tight sound. But the options are pretty much endles.  I'm not really too sure about maximum power before you run into a power draw, but it (again) depends what you are looking for.  If you are looking for earth sattering bass you won't find it in that alternator / battery combo that comes with the car.  If you don't want bra snapping, panty dropping bass, but clean sound at higher volume, wire up a decent 4 channel amp for the front and rear speakers and then just a minimal mono or two channel bridged for one sub.

get amps which have low fuses, say 15 or 20amps ;)

dont go getting amps with 30amps or higher fuses as if you try running 2 of these your bound to run into troubles.

calculating current draw this way is very rough but it should give you a rough idea just by going of what kind of fuse the amplifier has can give you a very rough estimate of what kind of power it is going to draw(very rough) but i think it will be sufficient in your case ;)

You should be fine with those amps with no real power draw problems.  Hook up the Kenwood 75 x 4 to your four speakers front and rear.  Then find out what the 200 W amp can run at.  IE 2ohm stable. / bridgeable. / stereo etc.  Then figure out the best way to wire the sub(s) to it.

they are on the back of the amp for extra protection i believe. I dont think this was a cheap amp being kenwood and knowing the person that had it.

 It is kinda weird since i have jumped a backo with those huge batteries (not all the way drained). the tractor wouldn't quite turn over, so i hook it up for a min, dont even rev it and it will start up, although one time when the battery was shot i did set it there for a good 10-20 mins reving it a bit, sometimes letting it sit and that thing would not start...