I think I got got.

[Cp1]

i wouldnt be too worried... yet. i mean if things get continually worse than yes but as it seems now a good used tranny could be in order and quite cheaply too if your up to the task yourself, which could also be the reason the kid sold it to you because having it done by a shop would have probably cost him way too much and he wasnt willing to do it himself... but the oil coolant thing is too early to tell... i would check it daily for next few months and if it seems to get worse than deal with it accordingly... its still a good buy if the body and interior on these cars is decent.... no one on here including myself has bought a used rx7 expecting the motor to perform flawlessly for long... and unless your the 1st owner its unfortunate that almost without fail previous owners do weird shit to these cars, leaving you to work out the kinks.