بسم الله الرحمن الرحيم
(1) If it is the drop of urine, then the ghusl shall be valid, and it is sufficient to wash it if it comes after some time.
(2) Yes, after washing it you will have to make wudhu afresh. If it comes out after wudhu then you will have to make fresh wudhu. If liquid comes during wudhu with surety then salah would be offered after making wudhu. But, if the situation turns to a level that the liquid is so frequent that you don’t remain pure even equal to a time in which you can offer one time of salah then you are an excused person according to the Shariah. An excused person can keep on offering salah in the same state, but he will make fresh wudhu at the time of each salah.
Allah knows Best!
Darul Uloom Deoband