HELP! 99 Tacoma 2.7L compression problem

I just bought this truck a week ago knowing it had issues but no idea what they were. The truck has no power and I checked the compression and it was 120, 100, 90, 100. They guy I bought it from had new Pistons, rings put in and the head re-worked. He seems to thing that the lifters may be stuck but I have no clue. What's yalls opinion so I can try to get it fixed so I don't waste time with it. Thanks

 

Check the timing. No power, as in it won't even run or just low on power?

 

That compression is abysmal. Sounds like stuck valves or really poor adjustment.

 

It's just really low on power. I also just figured out that is using oil seriously bad. I changed the oil a week ago and I was 4 quarts low. Manual said it holds 5.8 quarts. It doesn't smoke and doesn't leak. So where the heck is it going so fast? That oil change a week ago was with 5w30. I put 15w40 in it this time so I guess we will see what happens.