I need help finding derailures for my gt aggressor pro. I bought it with none and I want a cheap fix for this if possible please help me find some that will work and are compatible

The rear cassette looks to be a 7 speed, the best derailleur for the price would be a Shimano Tourney. It looks like you can reuse the cable outer, but you should replace the inner cable. For the front derailleur, A Shimano Tourney should work fine. You’ll want a clamp on style front derailleur. You’ll need a new chain as the current one has been shortened to work as a single speed – it won’t function with a derailleur.