newbie to bicycles
So I recently found this bicycle at the local Goodwill for 7.99. Both tires were initially completely flat but after getting it home, they seem to hold pressure fairly well. I am wondering what I have here. I am looking for a decent bike to get me around short distances and the occasional longer bike ride when it's cool out.
The problem with this bike is that a lot of the cables are fraying, the brakes tend to stick and rub against the wheel after applying them and shifting the gears doesn't always work very well.
The model of the bike is a Jamis Explorer XR. The rear brakes say "Suntour pedersen design. self-energizing system". The rear and front derailleur says "Shimano Deore XT".
I have tried tuning the bike myself and got it from initially not shifting gears at all to working well occasionally. Do I need to just replace all the cables after hosing it down with some degreaser to clean the thing?
Basically, I am looking for a little guidance on cleaning/fixing this bike up into good working condition for a "get me to places that are too close to drive" bicycle and on a college students budget.
Thanks in advance.