My character is ignoring some collisions

Questions & Answers
1

My chararcet as colliders. the other objcts have colliders, but my character keeps getting inside of stuff, like walls, the problem i think is in the transform.translate.
could anyoune help me??
My jumping its also bugging any gess??
my character code is here:

using UnityEngine;
using System.Collections;

public class walkperson : MonoBehaviour {
public float velocidade;
public float voo;
public GameObject bala;
public float timeLeft;

// Use this for initialization
void Start () {
}

// Update is called once per frame
void Update () {
    if (Class1.contadorglobal == 0)
    {

        if (Input.GetKey("w"))
        {
            transform.Translate(0, 0, velocidade);
            timeLeft -= Time.deltaTime;
            if (timeLeft < 0)
            {
                GetComponent<AudioSource>().volume = Random.Range(0.8f, 1);
                GetComponent<AudioSource>().pitch = Random.Range(0.8f, 1.1f);
                GetComponent<AudioSource>().Play();
                timeLeft = 0.5f;
            }

        }
         }
        if (Input.GetKey("a"))
        {
            transform.Translate(-velocidade, 0, 0);
        }
        if (Input.GetKey("s"))
        {
            transform.Translate(0, 0, -velocidade);
        }
        if (Input.GetKey("d"))
        {
            transform.Translate(velocidade, 0, 0);
        }
        if (Input.GetKey("space"))
        {
            transform.Translate(0, velocidade, 0);
        }
2

I had done some search and i will change the translate, to move or to rigidbody.addforce.
thanks for the answers