Q: lost my passcode for phone how do i get a new one?

Forgotten Screen-Lock Passcode
Connect the iOS device to your computer and try to make a backup
iOS: How to back up
https://support.apple.com/en-us/HT203977
Then restore via iTunes. The iOS device will be erased. Place the iOS device in Recovery Mode
https://support.apple.com/en-us/HT201263

if necessary to allow the restore.
If recovery mode does not work try DFU mode.
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
                     
https://geekindisguise.wordpress.com/2009/07/16/how-to-put-ipod-touch-iphone-int o-dfu-mode/
For how to restore:
iTunes: Restoring iOS software
https://support.apple.com/en-us/HT201252

To restore from backup see:
Restore your device from an iCloud or iTunes backup - Apple Support
https://support.apple.com/en-us/HT204184
If you restore from iCloud backup the apps will be automatically downloaded. If you restore from iTunes backup the apps and music have to be in the iTunes library since synced media like apps and music are not included in the backup of the iOS device that iTunes makes.
You can redownload most iTunes purchases by:
Downloading past purchases from the App Store, iBookstore, and iTunes Store   
https://support.apple.com/en-us/HT201272
 
If problem what happens or does not happen and when in the instructions? When you successfully get the iPod in recovery mode and connect to computer iTunes should say it found an iPod in recovery mode

or

If you previously turned on FIndMyiPod on the iPod in Settings>iCloud and wifi is on and connected go to iCloud: Find My iPhone,

sign in and go to FIndMyiPhone

https://support.apple.com/kb/PH2696?locale=en_US&viewlocale=en_US

and use Remote Wipe

https://support.apple.com/kb/PH2701?locale=en_US

to erase the contents of your device. If you have been using iCloud to back up,

https://support.apple.com/kb/PH12519?locale=en_US&viewlocale=en_US

you may be able to restore the most recent backup to reset the passcode after the device has been erased.

You can also wipe the iOS device by installing the FindMyiPhone app on another iOS device and using that app to wipe the device.