Hi Gabby,
Good choice on the IP-036 !
The IP-036 will come with a tapered headtube so you will need to buy a tapered fork, which will be a 1.1/8 - 1.5" Tapered.
(You can buy forks with straight steerers but will need headset adapters, this can be avoided if you are buying new)
The rear shock size will be eye to eye 165mm (6.5")
The headset will also need to be tapered. Cane Creek do a mix and match range, top bearing cup Inner diameter is 42mm
http://www.chainreactioncycles.com/cane-creek-40-series-is42-top-assembly/rp-prod115645The lower bearing cup Inner diameter is 52mm
http://www.chainreactioncycles.com/cane-creek-40-series-is52-40-bottom-assembly/rp-prod115643There are many different options available ! Your chindor can also include one with the frame if you ask. Many on here have used that option (Neco/FSA)
You can specify which Bottom Bracket you want your frame to be. I went with BB30, the down side to BB30 is that you need specialist tools to fit the bearings. If you go with BSA the bearing cups screw into the frame so is much easier to fit/replace yourself.
As for which FD I cant really help. I went with a 1x11 set up so I did zero research on the FD ! I'm sure others will be along to chip in with advice on that !
Good luck with the build and ask about anything you have doubts on, everyone on here is super helpful !