Welcome. All bodybuilders should consume fats. Just make sure it is the right kinds and not too much of it.
Martial arts and
weight lifting compliment each other very nicely.
As for supps, if you are on a limited budget, protein should be your #1 choice. Whichever brand you like -- they are all pretty much the same. A multi-vitamin mineral tab is good. As is creatine, glutamine, flax oil. Then you can get into tribulus, velvet bean, ECA, etc, etc, etc. If you are not careful you can go broke on supps, lol.