How do i transfer my txt messages from my phone to my computer?

Easiest way is to scan your phone and print the scan.

If you want print out few text messages then you can take the screen shots and email the pictures to your computer for printing or simply AirPrint the screenshots. You might also consider third party apps like iPubsoft iPhone Backup Extractor to print out your text messages. This article discussion worth a look:
How to Print Text Messages from iPhone 5C 5S 5 4S 4 on Mac PC

BitPim will retrieve your SMS or text messages. You can view and/or browse thru them, and there is also an export and print option.

to transfer pc suite is needed u got an cd with pack and install it on computer and u r ready

To transfer data from your phone to computer, you can try some data backup softwares, and I think it can be easier with an android assistant tool,
you can save a lot of time to transfer or backup text messages, contacts, photos, and other media files like videos, music files.
Transfer Text Messages from Android to Computer PC

You will need to download a software called mobile phone tools to get this done. You will also need a data cable or a bluetooth dongle on your PC so that you can connect the phone. http://www.bvrp.com/ENG/products/
After downloading and installing the above software follow these steps to transfer the msgs to PC.
Open Mobile Phone Tools
Press F3 (for transferring messages from outbox) or Press F4 (for transferring from inbox)
Select messages you want to transfer
Select EXPORT
Choose format/destination. I would recommend txt format as it is real quick.

Hope that helped,
Sai.

Maybe you never activated the phone to receive txt messages. Call up sprint and activate incoming txt.