Drainage is minimal with good tummy tuck surgery technique. On your part, you should restrict strenuous physical activity in the initial post operative period. 

You can hide the drain after tummy tuck by carrying them in a small purse or a bag.

Tummy tuck drainage is usually light yellow,. pinkish sort of fluid. initially it is more red and slowly colour will change to light yellowish pink and gradually it will stop coming 

start lymphatic massage after 3 weeks of tummy tuck

After tummy tuck you are provided with a specialised medical grade garment which has to be worn for a few months. You do not need any other material. This garment helps in maintaining shape, decreasing pain, preventing fluid collection under stitch line of tummy tuck.

usually everything settle down by 3-4 weeks after tummy tuck surgery. so i think it's a good time to start your exercises. start with light exercises and see how much you are comfortable and then accordingly u can progress your exercises after the tummy tuck. 

drainless tummy tuck is basically performed when sagging is there only in lower half procedure called mini tummy tuck. if extensive dissection is done then we need to put drains. 

You can swim after 3-4 weeks of Tummy tuck Surgery

After tummy tuck procedure, start massaging the tight area. u can use any moisturizer of your choice or u can also use coconut oil. This can help after the tummy tuck surgery.