I reached Jammu and from there I took shared taxi from Jammu Bus Stand which would take you around 15 Minutes from railway station. Cost of shared taxi would vary from Rs 1000 - 1500 depending upon the season you are visiting Srinagar. It would take you around 6-10 hours from Jammu to Srinagar depending upon the traffic. In my case it was around 9 hours as there would be two one way tunnel coming en-route which would have more traffic.
I was very young when I saw Mission Kashmir movie and I always wanted to visit Shikara house boat and roam around dal lake. I took auto from road and asked him to drop me by dal lake. Once you reach Dal Lake, you will find hundred of option depending upon your budget. Average cost of boat will be between Rs 500- 800 with three to four hour of journey.