How would you wire 6 speakers to a 2 channel amp?

So in about a year or so i'm getting a Scion Tc. I was wondering how would i wire the amps if possible. my plan was to change the 4 stock pioneer speakers to all 6.5 3 way after market pioneer speakers in the front and rear keeping the stock tweeters. Then in the trunk i plan to add 2 subs and mount in 2 6x9's in the trunk also. I plan to get a mono amp to run the subs and probably a 2 channel amp to run the 6 other speakers. so how would i wire the 2 channel amp to run the 2 6x9s and the 4 6.5 inch speakers? is it possible or would i be better off getting a 3 or 4 channel amp running 2 speakers to each channel. thanks