Is there any reason for me to buy new irons?

[Unforgiven93]

My dad gave me his Taylormade R7 TPs 3 or 4 years ago, I'm not sure. Would it really benefit me at all to get new irons at the point? Maybe custom fit? I want to take my game to the next level through next summer, and just one shot fewer per round is a big deal at this point. If you do think it would be worth it, I would love some recommendations. My drivers swing speed is roughly 115. My irons tend to have a slight fade. Edit: My irons are the oldest clubs in my bag besides my putter. My putting kind of sucks to be honest, but I've always felt putting is just you, not the putter. I think my putter is going on 5 years. Would a new putter do anything at all? My driver, wood, hybrid, and wedges are all basically new this year. Thanks.