3rz timing help please!

Working on my 1997 4wd 2.7l tacoma;

Soo im doing my own head gasket job after someone worked on it but didnt put enough care in; reused head bolts, used grey silicone sealant instead of the oil pump o ring, and cracked the harmonic balancer by bolting it down without lining up the key.

Got it to top dead before taking it apart, but when i got the timing cover off, none of the marks were lined up. He also replaced the whole timing set, so i cant be certain how he lined up the timing before putting it back together.

I have to take the crankshaft gear off to replace the key, and im not sure how to be certain the marks on the gears match the internal timing.

Ive taken off and rebolted the left balancer bolt to ge the chain off to see if i could get to the key, had to adjust a little but pretty sure i put it back where it was.

Do i just turn the crankshaft to get everything to line up? Im not farmiliar enough with how the timing is set internally to be certain enough to put it back together yet.

I could realllly use some help, he kind of screwed me, he said he would help with the repair a second time and ghosted, and ive been stuck away from home since december because of this.

Thank you!!