No worries; your questions seemed more like a general "can I lift my 4Runner with Bilsteins / FJs" (which is covered pretty well in the sticky) and less about the technical details of doing so.
You can lift with Bilstein 5100s, you can lift a small amount with FJ shocks/springs, you can lift with stiffer springs, you can lift with spacers if you want to. I think you can even run Tacoma shocks/springs if you change the lower mount bushing, don't quote me on that though. Tires won't need replacement for a lift, but any lift over ~3" will need new upper control arms; the stock ones won't provide enough caster. A front differential drop kit will also help bring the CV joints back into alignment if you feel it necessary.
How much lift are you interested in, and what are your plans for your vehicle? You might want something super beefy if you're planning on flying through the desert, but that would be way overkill for a few gravel roads & mud puddles. For mostly asphalt and occasional wheeling, the Bilstein 5100s seem to be pretty well regarded, and you have options on lift height with them. I don't think they lift the rear though, you'll need stiffer springs or spacers to accomplish that. Do you have (or plan to have) aftermarket bumpers? If so, consider upgrading to stiffer springs to combat the added weight while you've doing suspension work anyway. Keep in mind, changing to new springs might lift you slightly more than expected as your stock springs have likely sagged a small amount over the past 9 years.
I'm not sure on pricing (I did my own install, and I only have spacers which are fairly cheap), but I know I've seen others quoting a few hundred for install (front & rear), plus cost of parts.
Hope that helps steer you in the right direction.
