Please Help Me

[RamiX5]

Dear All:
im new in this site and i need a huge kinda help
i got X5 2003
I bought it used last year
Since that time till now almost 11 months I spend a lot on it even the mileage for it is low!! about 80000 first time the radiator then AC, bearings, electric fan, water pump, phone base, window lifter (3rd time), suspension balloon, and now the transmission something wrong with it I came to the office I parked the car like every day but when I went out I turned the car on and it gave me that feeling like the hand brake in on or like your pulling an 18 wheeler??? Then it’ll change to 2nd gear and it will go like every day sweet? Really I love this car but if I’m going to spend a fortune on it I’ll sell it

Are you ppl spending that much on a X5 or I’m the only unlucky person

Please if any one know how can I solve this I need help

By the way I didn’t change gear oil till now some ppl told me don’t change it cuz your gonna change the whole gear after that others said change it no problem???

Pleaseeeeeeeee help
Regards