Go to a scrap yard and look for a GS, GX or anything of that level and up. They come with boot lights, so if you get the light and get the trim from that side too (much easier than chopping up your current one), then you can just fit them into your car and wire them up.
If you don't already have the wires for the light tucked behind the trim then you can quite easily run your own wiring under the carpet and to the fuse box, pick a 10/15amp fused constant live and splice into it.
The boot lights have their own switch so you don't have to messaround with putting one on the boot lid.
As for wiring up your LED's in the front to some extra door switches, get two passenger side switches for this job. They only use a two wire setup, basically providing an earth to the light when the door is opened. The drivers side switch use three wires which makes it more tricky. So two passenger side switches, a boot light and it's side trim is what you need (you will have to remove the back seat to take off the trim).
And remember to always disconnect the battery when doing any kind of electrical work!!!!!! Can't stress that enough.