5.0 update.zip? topic

So yesterday the 8th i bought the 2nd gen xt1064 off a guy on craigslist, story short... phone is great it came with stock 5.0. Bootloader was not unlocked but i was successful in doing so. Flashed twrp 2.8.3.0 just fine, supersu v2.02 flashed but when i went to open it it hit me with a message that it did not have any binaries or what not and force closed. I tried flashing another one but it got me stuck on the bootloader warning forcing me to downgrade to 4.4.4 (21.11.23) Now stock recovery shows: KXB21.85-23 i tried the ota lollipop update but it fails.

Any solutions on getting around, also what are the commands to lock the bootloader again just in case its a requirement? Sorry for the all the Q's im coming from a galaxy s3.