Some random bits of information for people new to film or toy camera photography based on questions seen in various Flickr groups as well as other thoughts that float into my mind as I write this.

You cannot get the photographs onto your computer without developing the film first. Only then can you print & scan the photograph or scan the negative/slide directly.
There is no "best" film to use in "camera x". Like ice cream flavors, everyone has their own personal favorites. Try what you can get your hands on and see what you like.
That medium format film is not called "120mm". It is called "120". There used to also be 119 and 121 and a host of other formats. Also there is no "135mm". 35mm film is designated "135".
You can get the "lomo look" with it's "saturated wild colors" in a Canon, Nikon or any film camera. Just cross process the slide film as a negative.
But for your first roll, process it normally so you can see how your camera performs.
Visit your local library and find a book that explains exposure, f-stops & shutter speeds. In the long term it will be worth it to know what you are doing.
Processing black and white film is pretty easy and you don't even need a dark room.
Printing (using chemicals) does need a dark room however. But you can always scan your negatives directly on a scanner and print digitally.
It is OK to "post process" your photos. What do you think those people who spent hours in the dark room in ye olden times were doing?
Unlike a digital camera, it is normally not a good idea to change the "iso" from shot to shot on a single roll.
You have a limited number of images per roll - it is worth slowing down and thinking about you are doing. Don't buy into the don't think mentality or you will probably be disappointed.
A basic Holga plastic camera shouldn't cost more than $30.
Don't buy every new film camera that comes along. You won't use them all. Stick with one decent manual or semi-manual camera for now and learn how to use it well.
You are allowed to also use a digital camera if you want. Don't listen to anyone who says you have to pick a side.
If your camera doesn't have a light meter built in it might be a good idea to invest in a hand held one. (Or google "Sunny 16 rule")
LOMO don't make Holga's, Diana's, or Action Sampler cameras. You are confusing them with The Lomographic Society. LOMO used to make the LC-A, the Smena range and Lubitel range of cameras but are out of the camera business now. (update: I should mention that LSI do not make the Holga - this camera is made by Tokina Company Limited which is part of the Universal Electronics Groups of Hong Kong.)
Using the same camera as someone else it not going to automatically allow you replicate the images they have. There is a lot more variables involved including light, film type, processing, post processing, exposure and of course the person standing behind the camera.

Feel free to add your own thoughts in the comments.