Struggles uphill

My 2013 Toyota Prius with almost 213,000 miles on it struggles uphill and revs loudly (rpm possibly too high) and loses power on steep hills. My car more often experiences sluggish acceleration once the engine warms up. I cleaned the EGR system a few months ago, replaced the PCV valve after discovering oil pooling at the bottom of my air intake manifold, in which yesterday, I discovered a recurrence of the oil issue and cleaned out the air intake manifold. And that the oil pressure sensor seal broke and oil started leaking out of that. The lower oil pan is leaking around the edges so I'm going to replace the oil pan seal.