I have been studying for 5 years but mostly practice by myself. I occasional go to my local school for sparing but practice primarily by myself. What ways can I learn new taolus and training exercises without help of my teacher?
A lot depends on where you are at in your training. If you are well on your way to mastering the fundamentals of your art, you can probably deconstruct forms from a video performance. A quick search on YouTube provides thousands of results. You can also ask your instructor if he/she has any video training aids. It might also be worth talking to your instructor about your situation. They may be willing to let you record video at the sessions you can attend, and you can work off of that when you can't attend.
If you aren't at the point in your training where you have a good understanding of the correct postures and mechanics of the techniques involved, working off of videos (and without feedback) might do more harm than good. You certainly wouldn't want to put muscle memory to a misinterpretation. Even without a deep understanding of the style's fundamentals you can spend your time without instruction honing your strength and flexibility. A huge part of the martial arts hang upon one's physical fitness. There is so much you can do to improve your overall fitness and flexibility in support of your martial arts practice which doesn't require any materials other than your body and gravity.
Another point worth making is that quantity =/= quality. You don't need a large volume of material to become extremely proficient, and if you already have a decent number of forms in your repertoire you can spend your time mastering them. Once you have a deep grasp of what the elements in the forms are, you can construct your own variations. These arts were all created by people, and not with any sort of special insight. There is no reason you can't do so as well (especially since you are looking for health benefits over combat effectiveness).