looking for tough estimate. On repairs for tranny and top end of engine.

What is your question?

Ok car starts up goes into drive no problem. Hard shift into 2nd and slips going into 3rd and fourth. Vacuum sensor? And to end of engine is knocking hard when it's cold and starts up but decreases in noise when warm. Plan on doing work myself can't afford to pay a mechanic. Single full-time father of two kids.