With a very limited supply of information I'll take a stab at this. If your screen is broken then clearly you won't be able to get a Text activation code, is it something that can be e-mailed? Can you have it sent to a different phone? I'm not entirely sure what it is you're trying to activate and do.
I want to set up my Verizon so I can read my text messages from there but it says I need send an activation code to the phone number. But that screen is cracked so I cannot read it I don't know if you can send it to another phone or email doesn't give me that option
I thought you couldn't post to the forum without already having a Verizon account...are you not already signed into your Verizon account? Are you not the main account holder? I just clicked on my verzon / my device / send and manage messages. It's the first time I've ever used it, and it did make me log in again, but it's the same log in I use for the forums. From there it didn't ask me to activate anything.
You do not have to be a Verizon customer in order to use the forums. You do have to be a Verizon customer in order to have a MyVerizon account. Even if you are a Verizon customer, you can have a forum account which is not associated with your MyVerizon account.
Perhaps create a chat session with Verizon and find out if you can create an account in their store. Otherwise you'll need to get your hands on a Verizon compatible phone.