Just bought my first RX-8

So yeah i just got my first rx-8 and damn this car is beautiful, much diffirent than alot of cars. I have never owned a rotary but been doing research and know the basics of how they work. Like letting it warm up before driving off or shutting it off cold etc etc. So anyways, i live on the big island of hawaii and im currently the 2nd owner now:wiggle:. It's the 2005 shinka edition 4 speed auto with paddle shifters. The current miles on the car is 116xxx but The was engine replaced at 72xx due to a recall? So technically has 42xx on engine. When i picked it up i was to excited to really think about if anything was wrong with it even though CEL was on i didnt really care but i had my fun and calmed down and started noticing little things wrong with. I went to my friends mechanic shop and got a diagnotics, the codes p0661 and p0302 popped up, I didn't really know exactly what they were so i kinda just drove it softly until i figured out what was up with it, but being in the car just made me want to drive hard and fast, so i did one more hard run and didn't really seem like it had much power? I couldn't hit over 7900 rpms and CEL code started blinking, i slowed down, the CEL code stopped blinking, drove home and parked it. Havent started it ever since so im kinda scared if i blew the motor or seals? Im not to sure what to do but im thinking about starting with coils, sparks, plugs. Any help on what is wrong with it i would greatly appreciate it. Also is there anything i should know about being over 100xxx on the car alone ( not motor) thanks!