You have the car & you have to decide how much to pay? - how much the owner is asking. what is current status of car. Is it working running on stock setup or already swapped work was performed. - Price depend 100% on shell condition engine setup papers & paid up taxes.
It is a rear wheel drive car, engine weight is critical to momentum & stop distance over the frame. The power train to rear wheels shall be proportionate to differential just in case you wish to keep it stock. do some critical swap paper work / net research for matching transmission & differential.
The 1.3L 5 speed manual variant of 2 door Corolla coupe was seriously under powered compared to sedan brother 4 speed manual.