Building or giving up ! ? 2,5 td

Hello , I am Andy and new here ! My Omega 2,5 t ,d Caravan Bj 11 /1999 drives me crazy ! Km 245 000 My automatic transmission spins . Has dropouts , or do I feel as if it somehow slips through . Engine turns up and then it packs again . Also at the kick-douwn . ! ? ? Lose powerful oil . Also at the over or (under pressure ) ? can exhaust gas recirculation . ? ! Engine compartment is super oily . Have done everything clean . But nobody can definitely help me . Motor Spri Bosch and Opel want to renew the diesel pump / gearbox and much more at Utopian prices. Or they tell me to sell the cart. Buy yourself a new one. And now somehow the steering is harder than if the servo does not support properly. ! ? Someone has any procedure ready. Or am I really a hopeless case. Greetings to all.