yea I would definitely agree on finding a reputable site as you can get the most accurate, non-biased info on those.
for my “biased” side (lol):
Cage question: Bunny’s don’t necessarily need to be caged, and mine are only in their cage when I sleep. I would suggest bunny proofing any areas you do allow them to run (block off cords or get cord protectors, watch for them digging up carpet [we bought strips of carpet and put them over the original carpet to stop the ripping], nothing that they can knock over and hurt themselves with), as well as have a litter box if you plan to litter train them (make sure you get the kinds of litter that don’t hurt little buns).
pen question: This, I’m not really good at answering. My rabbits roam the whole livingroom lol. Would be based on how large of a bun you get.
pellets and hay: Someone posted this link for another website the other day that compares foods as well as explains what is better for a bun http://www.therabbithouse.com/diet/rabbit-food-comparison.asp?diet=adult&sortby=Fat#chart as for hay, you may have to experiment a bit as buns can sometimes be picky. Ask the ones you adopt the bunny from what type they give their buns and that might help a bit. My buns seem to prefer timothy hay. For growing your own, I would of course suggesting figure out what they like best before going through all the trouble! Make sure you don’t use pestisides or anything that may harm a delicate bunnys tummy.
Breeds: I’m not too fond with the different breeds as both mine are small breeds (mixed) but it does seem to be in how you take care of them. Constant love and affection makes them happy buns Getting a bun fixed can dampen down some aggression. Picking them up a lot, anything they see threatening (running at them, yelling, etc) can cause aggression. I prefer my little pocket sized poof balls just because I do live in a small apartment.
Finding your rabbit: Well, I found my oldest from a private breeder who was giving her away on craigslist (I know, bad lilly!) due to him being a show-bunny breeder and Midnight having a bad foot. My younger one I found at a pet shop that was closing down and his little sad eyes just stole my heart. If your looking for a bunny that’s definitely fixed, your best bet is an animal shelter, but, may also pose some threats if they had previous owners that took bad care of them. You can also find non-profit strictly bunny rescue centers based on where you live. For example, I live in sacramento, so we have Second Chance Bunny Rescue and Sacramento House Rabbit Society. They will likely be fixed but may pose a problem as stated before. You can sometimes find little pet shops that have bunnys, but you may have to worry about not knowing their breed (or their size when they grow) and most the time aren’t fixed.
If you have any specific questions, I’m always free to private message