Toyota specs parasitic draw should not be higher than 50 milli amps on it's later vehicles that have more parasitic draw due to key fob receivers and security computers that stay powered up all the time... I've measured it on my 2000 4Runner and it runs around 40milli amps..

The parasitic draw on your vehicle (without those features) should be even less.

As you already know 10amps will pull a battery down very quickly.

Sounds like the hazard flasher might have a problem.. although it's hard to imagine it drawing 10 amps without smoking it.

Since it's related the flasher circuit I'd try removing the bulbs, (thinking that one of the bulb sockets may be shorted to ground) and checking the wire runs to the bulbs. With the long runs of small gauge wire to the sockets, it may just be heating the wire instead of smoking it...