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1; Low oil pressure. First step is to replace the engine oil and see if that makes any difference. If it makes no difference I would suspect the oil pressure sensor as the next most likely cause.
2; Over heating. Has the cooling system recieved any maintanence in the last 6 months?
There is a number of things that can cause overheating, or it could be a combination of things that together cause the fault. There could be internal or external (or both) radiator blockages, faulty thermostat, or a faulty water pump.
3; Dash squeeks. No easy way to fix these. You need someone with a keen ear to sit in the passenger seat and try to identify where the noises are coming from while you drive. Once you have identified where the noises eminate from, you need to work out the best way to fix them. If you have 2 pieces of trim rubbing you might try trimming the surfaces to create clearence, lubricating them with vasaline or packing the area with foam. You need to work it out on a case by case basis.