Will removing tonsils and weight loss will improve my sleep if i have sleep apnea?

Likely so: Enlarged tonsils and obesity are two well known contributing factors to sleep apnea.

Weight loss: weight loss alone will make a huge difference and will have many other health benefits also. Weight loss is a difficult task though.

Sleep apnea: Losing weight will help and sometimes you would not need surgery of you did, Make sure you get a sleep study to really determine if you have apnea and how severe it is