Is it possible to 3D print a whole suit?
Yep, it'll take a lot of material and time but it's possible.
And what's a good 3D kit to get, I've been googling around and came across some but there's so many I was wondering if anyone here has one?
Are you willing to spend time frelling around with the machine and the software? If so, get one of the big Rostock Max Delta V2's. If not look at the MakerBot models before they introduced the auto filament feeder, or perhaps one of the FlashForge machines.
I assume need one with a big print area ?
Yep, makes things much easier when finishing the parts, less glue lines and gaps. That's why I suggested the Rostock, huge build space and excellent accuracy.