At 202,495 poly this model will need to be split up for sure. and scaled to what you need. Also determine which parts will not fit on the map when scaled up and not use those parts.
As far as the textures go, you can bake the textures onto one sheet (4096 x 4096) from the whole model
Then they will be together. As far as how to do this in Blender not sure, as I use max, but you can search this on the internet and should come up with the answers you need.
Edit:
I would split it then bake the separate pieces, this will take some time to do.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 4gb RAM, Nvidia gtx660, Windows 7 Pro 64bit
