How many dialogue(lines) should each scene contain? Is there a maximum? Thanks for answering!

Yeah, I mean there isn't any set number for it. It's really just about what needs to be shown and said and how to balance the meaning out between the two. If it can be shown, show it. If you need to say something, say it. Just don't saturate it with one or the other. If you have no dialogue, you run the risk of making your movie unrealistic and even confusing, but if you use too much, then you bore the audience.
Yeah I agree with you. As a novice it is the right suggestion, However I read
the script of Lincoln the dialogues are very big . He is also showing two columns, that
is he is having two speakers , still I loved it
When I look at a script for the first time, I flip open to a random page and scan for the ratio of action and dialog. If there's more than 50% dialog, it needs to be from someone I know for me to actually read any of it.
This revelation came after putting out a request for scripts to produce... I got hundreds of them. I started to notice that the unreadable ones that took for ever to get through had no action blocks in them describing the setting, the action or even descriptions of them... I went on to realize that the magic 50% balance throughout was a trait held in almost all of the readable scripts. Note that we're still not at good yet though -- that's story + storytelling + writing talent; which takes practice and lots of it. After that, I gave the script 5 pages to hook me or I'd put it down and move on to the next one.
It all starts with the script.
I don't want to hijack, but Knightly, I was just wondering where you solicited/advertised for scripts and what were you offering to pay for said scripts, if any.