Finished euflexxa did therpy exercise now in knee brace due to that, how long after last shot should I wait until I use exercise bike& ecliptal therpy?

Ask your doctor. Since your doctor knows the particular conditions in your knee he or your physical therapist will give you the best guidelines on how to get back to physical activity. In general it's best to start with non- weight bearing exercise like biking then moving into things like ellipticals.
Now is fine. You can start low impact exercise now. Exercises that strengthen your leg muscles will help to decrease knee pain.