Q: how can i transfer my old iphone4 text messages and pics to my new iphone6 which im using now since 2 months?

Hi drsricharan,

When you first got your new iPhone, did you set it up as new?  Or, did you restore from the iCloud or iTunes backup of your iPhone 4?  That is how you would get the information onto your new phone.

Transfer content from an iPhone, iPad, or iPod touch to a new device
https://support.apple.com/en-us/HT201269

Happy Holidays!