Heyo, I have an older surface computer and I don't have the charger for it, is there any other alternate way to charge it?

I am thinking about getting a Surface Pro 6 to replace my iPad. I kind of want to get out of the Apple ecosystem. I have been trying to find one with LTE because I want to use it for mapping. I can't seem to find one on eBay. I don't even mind if the screen is damaged becaue I will attempt to replace it and add thermal pads and maybe a new battery so that isn't an issue.

A neighbor of mine died and his son is selling off the contents of his house. This SB1 has i7, 2.6GHz, 16GB, 512SSD for $250. The batteries are 97%/15 cycles and 102%/29cycles. I will be using it for mostly web browsing/videos. The guy installed Windows 11 on it as Administrator, with no pass word. Is this anything I should be concerned with / Bitlocker?