how much will cost to change from a a/t to m/t in 94 acoord and what engine do i need to get and were

 

You don't need an engine to do a manual transmission swap. You only need the transmission. Any 90-97 5spd trans out of an Accord will do. You could also use an H22 or H23 trans out of Prelude. Choice is yours. As for price, if your not willing to do any of the work yourself. My suggestion is that you to call a few local shops and get some quotes on the job.