New to the Forum, New to Supras, but have 2 coming my way

[SnowSupra]

Hey guys, i finally brought those two Supras home, and regardless of the work ahead of me to fix it up, i am extremely excited! Such beautiful cars! anyways, I just drove mine a little bit around where I live and i have only given the car a basic clean inside and out. It seems to run alright... but i have noticed a bubbling noise behind the dash at about 2000+ rpm while not moving.... aside from that, mechanically everything seems alright, but just to be sure... i want to know where to start, and get as much advice as i can from everyone with experience... as i said before the car has 229000 km on the engine, and she was in an abusive relationship with the past owner
Im going away for a week, but when i get back I was thinking of draining and replacing all fluids and possibly sparkplugs depending on condition... If you guys could give me some pointers on the coolant, oil, etc. to use, and how much of it, and any tricks, it would be greatly appreciated! Thanks all!