Compressor vs noise suppresor

Im a noob in effects, Im starting to get my pedalboard, when i connect more than one pedal my ampeg hums, a friénd told me that i needed a noise suppresor and i bought one. In the other hand I like the sound of flea in around the world in the part that comes after the overdrive, and a friénd suggest me to buy a compressor, so that way o could sound negar that, but, I've always tought that a compressor is a effect that simply makes you sound the notes with moré definition, and a noise suppresor is, well, exactly that, only kills the noises that the bass and a lot of pedals connected make. Another friénd told me that if i get a compressor i wont need a noise suppresor so that confused me a Little of what i tought was a difference in the se two things and now i think i dont know anything

Muchas gracias por su ayuda!!!

 

Ammmm well the hum i tought it was a thing of my house conection, and i fixed it, it worked but it still sounded. That bass is a Fender p lyte, and when i touched the treble knob the hum changed, and decresead, i took the bass to service in the morning, anyway i pluged another bass and the hum dissapeared. Note, english is not my first language hum and noise are different things right??

 

Hahaha Im mexican, and the girls are like my basses, you either finger them or slap'em