03 Opel Vectra

So my wife has this god awful vectra that she loves i want to sell it but she don't want to sell it the car has many problems with it the bumper's has marks due to wear and tear over the years. in the mornings shes starts but as soon as the car parks up and the key is taking out when she goes back to start it there's is a ticking sound coming from the left side where the battery/starter is i reckon the starter is gone some people told me could be a faulty battery but if the car left alone for a awhile she will start on the first go dose that indicated a problem with the key/ignition. erg flow is gone so she is losing power in 3rd gear. I'm on the look out for a 03-05 vectra for breaking so i can at least give the car a new lease of life into her.