Questions first:
1. What kind of triathlon? Draft legal UTI? Non draft legal? Long course (70.3 or 140.6)?
2. Ever had a bike fit?
Comments next:
1. That bike ain't nowhere near worth that. Don't even bother.
2. At that price point, you should be able in a road bike to be able to get something pretty modern and carbon in the 105/Ultegra 11 speed kind of equipment if you look. Like a model year 2015 or so. Then still have money for clip ons.
3. In tri, other stuff costs too that makes a difference worth budgeting for: bike fit, race tires, TT helmet, good fitting triathlon suit
4. If you're really getting into tri and it is not draft legal, a tri bike is the way to go. It's built around both the speed, and often the hydration/nutrition and storage needs of a triathlete. Bike racers can't legally carry bike integrated storage for hydration or tools or nutrition. Triathletes can. And having the ergonomics of a tri bike really helps you both be faster in a tri, and also enjoy the event more. Tri bike is always the answer if it is not draft legal.
See if you can get a used Shiv with the hydration or a used Cervelo P2 with Shimano 105 on it or something.