Swapping Engines

I have a 2000 Toyoga celica gt with the VVT-I 16
Valve Engine. I'm not that knowledged on engines
and the conditions it takes to swap engines. So I
was wondering if there was an engine I could buy
to swap out with said engine above and not have
to many tthings to worries about ex. And to change
suspensions or things of that nature. So bottom
line is, what engine could I swap too and have the
least amount of additional part swapping to do if
possible.