Re: movies/t.v. vs comic books
Most definitely. Lana and Clark were high school sweethearts until he revealed his secret to her and left Smallville. She came and went in his life for a while. She was even a bridesmaid in Clark's and Lois Lane's wedding. She was married to Pete Ross, had a child (premature), had that child stolen by a Lex Luthor-inhabited Doomsday, and is still around, AFAIK. Pete Ross was VP to Luthor's Presidency, and has recently taken over the Big House (I think...I'm behind on Superman stories). Lana is still around, but is (or already has) leaving Pete Ross.
As Hermit said, Doc Ock has always had 4 mechanical arms, bringing his total to 8 appendages. Spidey has always used artificial webbing until very recently (not including when he wore the black-and-white-pre-Venom costume, which shot a version of webbing all it's own without need for cartridges). Note that "Ultimate Spider-Man" and the old "Spider-Man 2099" have/had natural web shooters.
Basic elements of the X-Men stories have been retained, as have the basic stories and personalities of the main characters, but to try and go point-by-point between the movies and the comics would be...well, pointless. The X-Men movies have compromised a great deal of story in order to get to the big screen. Too many characters to develop fully, so they cheat and give you a short abbreviated version that's more a nod of respect to the originals rather than a true adaptation.
There have been allusions to his training off and on, but I believe Frank Miller's "Batman: Year One" storyline is considered "canon" these days. It's always been my understanding that Bruce Wayne did, in fact, travel a bit in order to fully train himself. The idea of "Batman Begins" is actually fairly faithful to the general storyline of "Year One", but of course it's been changed to meet on-screen time constraints and general pacing.
Couldn't tell ya about the Batmobile. It's had so many friggin' versions who knows what's canon anymore...