Goal for Tiffy was end of this year yes but we had 3-4 months delay on Hawk latter part of last year. That also put development of Tiffy back a few months. Also to access certain information on Typhoon we had to do a few things, they are in progress and ongoing.
Typhoon external is in DCS, cockpit is being tweaked and once Hawk is out I'm going to focus on clickable cockpit test system. As you can imagine all focus is on getting Hawk ready in the next few weeks.
We have separate teams working on different projects, all at different stages of development from modelling, skinning, coding, flight models, etc. plus projects I can't disclose right now.
Would I like a functional Typhoon by the end of the year, yes. What level of functionality depends on classification and what we can do in that time. I'm not going to say a definitive time for Typhoon but long term to me means end of this year / Q1 2015.
We already have it flyable in DCS, with our custom cockpit and basic animations internal and external.
The time will be coding the systems but we've learnt a lot from Hawk and can use some of that.
Hope that answers the question in a round a bout way.
And to answer the tanker question, yes we need one for refueling Typhoon. It's on our development plan. Which plane is still being decided and another team will be doing that one.